Fuel injectors are a vital component when it comes to starting your car. As long as you keep the injectors properly maintained, your vehicle’s MPG reading will be more accurate, the engine block won’t be as loud, and motor chatter will be eliminated. In addition, clean fuel injectors can slightly reduce emissions. It’s a good idea to use the proper cleaner so you don’t have to maintain your injectors as frequently. Plus, the product can boost your vehicle’s overall performance. We list the best fuel injector cleaners in the buying guide below.
The Best Fuel Injector Cleaner
The Techron Concentrate Plus fuel treatment is a powerful product that cleans your entire fuel system. Chevron’s name is synonymous with superior power, and its fuel cleaner showcases that. Use this on any vehicle you have, including the engine on your boat, RV, etc. It restores lost power and acceleration.
This product will replenish your lost fuel economy and eliminate horrible firing issues—including loud and rumbling idling, hesitation, and problems with your spark plug on startup. If you’re in a rapidly changing environment, this protects your engine from negative cold startups, makes starting easier, and lasts for up to one year in your system.
- Works on your entire fuel intake system, not just your injectors
- Designed to work on ATVs, dirt bikes, and boat engines as well
- Reduces idling issues and eliminates spark plug fouling
- Brand Chevron
- Model 65740
- Weight 20 ounces
Red Line is known for its oil and fuel additives, but it also sells other products you may be less familiar with. This fuel system cleaner optimizes an engine’s performance, which is useful if your system requires an in-depth cleansing. Red Line’s patented formula gives most users 100 percent efficiency the first time they use it.
Red Line’s formula cleans injectors, carburetors, and more while preventing corrosion and reducing the buildup of gum and varnish. It’s available in a single 15-ounce pack, a two-pack, a six-pack, or a 12-pack for even more savings.
- In most cases, 100% efficiency after the first clean
- Contains complete upper cylinder lubricant (synthetic)
- Two uses per bottle (use the full bottle if your vehicle has been neglected)
- Brand Red Line Oil
- Model RED60103
- Weight 15 ounces
Liqui Moly does much more for your engine than a standard injector cleaner. If you have problems during startup, such as rapid clicking or stalling, they’ll disappear once you add some Liqui Moly. It provides a better throttle response as well as smoother idling by eliminating minimal vibration and unwanted chatter from the engine.
Reasonably priced and available in 10.1-ounce bottles, Liqui Moly’s solution is great for older vehicles/engines. It’s a good way to optimize performance. Fuel injectors go through the paces, and they need a thorough cleaning now and then. You’ll notice an immediate performance improvement, and it can be used as a fuel additive afterward.
- Thoroughly cleans combustion chamber
- Eliminates issues that occur on startup
- Much smoother idling after use
- Brand Liqui Moly
- Model 2007
- Weight 10.1 ounces
When you don’t have time to take apart your fuel injectors, you need a cleaner that you can add to your fuel tank. STP is designed to complement capless gas systems. It removes harmful deposits, so sediment and sludge don’t stand a chance.
This formula increases oil pressure and boosts city and highway fuel economy. In most cases, it can optimize performance by as much as three to four miles per gallon, and it’s great for any make or model. STP offers its solution in a twin-pack or six-pack, and each plastic bottle is designed so that the liquid is easy to pour out.
- Perfectly compatible with capless gasoline systems
- Works hard to remove sediment deposits and sludge around seals
- Powerful enough to be used as a fuel additive and still remove clogs
- Brand STP
- Model 78577
- Weight 11.2 ounces
Lucas is a leader when it comes to fuel and oil additives, and this formula provides a solution that cleans your engine block while it runs its course through your system. You can increase your fuel economy with this value-size, 1-gallon fuel treatment, which comes in an easy-to-pour bottle. It also lubricates your system while you clean it.
If your injectors are old, or you just want to prevent them from sustaining any more damage, Red Line is a go-to product. Essentially, it’s an all-in-one product that gives you the benefits of a fuel additive and the power of an oil additive, and it cleans your fuel injectors like a professional.
- Increases life expectancy on pumps + injectors
- Cleans fuel intake system while lubricating
- Increases power while also increasing fuel economy
- Brand Lucas
- Model LUC10013
- Weight 8 pounds
Now is a good time to try Royal Purple if you’ve never used it. Royal Purple has been a go-to product for many people over the years because it delivers good results. When you use this product, you’ll eliminate stalling and hesitation issues as well as promote better fuel economy.
The Royal Purple Max Clean formula stays in your vehicle’s system for some time after use, upholding high-performance standards. Using it can increase your horsepower and decrease harmful emissions by up to 18 percent. Spending a little extra on this product pays off in the long run.
- Prevents hesitation and stalling
- Upholds optimal performance long after use
- Improves your fuel economy, on average up to 3% or more
- Brand Royal Purple
- Model 11722
- Weight 1.25 pounds
Sometimes big things come in small packages, and that’s the case with this fuel injector cleaner from Gumout. It’s seriously potent and rises to the task. This fuel injector cleaner continuously lubricates your engine’s fuel system for months following application, which reduces the rate at which sediment and stubborn carbon deposits can form.
Gumout reduces emissions, maximizes fuel economy, and provides superior protection for multiple components of your engine block. It transforms your clogged injectors so they act brand new, as far as performance goes. Gumout is the ultimate preventive measure to extend the life expectancy of your injectors.
- The answer to supercharged and turbocharged vehicle issues
- Removes stubborn carbon deposits (on engines over 75,000 miles)
- Lubricates effectively to reduce sedimentary deposit buildup rate
- Brand Gumout
- Model 510013
- Weight 6 ounces
If you put a variety of fuel treatments, additives, or other products in your vehicle and you want to know whether the fuel system cleaner you choose will adversely react with these chemicals, consider using the BG 44K Fuel System Cleaner. Its unique formula is compatible with common fuel additives, alcohol-blended fuels, and other fuel system materials, so you don’t have to worry.
The 44K easily cleans not only your fuel injectors, but also your combustion chambers and the valves on your engine, allowing it to breathe more efficiently and drawing the much-needed power from your fuel system to drive your wheels. Car enthusiasts testify that 44K can transform a car’s fuel system into a highly efficient mechanism, saving you gas and giving you the power you need from your engine.
- Compatible with a variety of fuel products and additives
- Improves gas mileage, power output, and combustion quality
- 11-oz can good for 20 gallons of fuel
- Brand BG
- Model 44K
- Weight 11.2 oz
It can be hard to determine when you should put a fuel cleaner into your system, and it often depends on the status of your fuel injectors. What’s great about the Techron fuel injector cleaner is that you can safely use it every 1,000 miles. Chevron also says you can put it into your car’s system as often as needed to make sure all the nasty deposits that build up over time are effectively removed.
Even though Techron is specially formulated for both carburetors and fuel-injected systems, it’s a good idea to be vigilant. It won’t affect your car’s catalytic converter or oxygen sensor if it comes with one or both of these devices. The only downside is that the Techron cleaner can’t be used on two-stroke air-cooled engines, so you must check your engine to determine its compatibility.
- Formulated for fuel-injected or carbureted engines
- Safe for oxygen sensors and catalytic converters
- Every 1,000 miles recommended use
- Brand Chevron
- Model 10055
- Weight 12 oz
If you want to reduce or eliminate the nasty knock your engine makes, Motorcraft has a solution. Featuring a unique blend of engine- and fuel-friendly chemicals, the PM6 cleaner comes with a high-strength formula that can erase your valve deposit worries. It’s designed to reduce engine knock and improve your gas mileage in the process.
It may not have a big name brand on its label, but the PM6 cleaner is gaining ground as one of the best fuel injector cleaners on the market. Even fans of more popular brands can’t help but be impressed by its overall fuel system cleaning performance. All you need is to try it to see what others have discovered.
- High-strength fuel cleaner formulation
- Eliminates deposits from intake valves
- Reduces engine knock
- Brand Motorcraft
- Model PM6
- Weight 12 oz
How Do Fuel Injectors Work?
Maintain your fuel injectors, and you’ll upkeep optimal performance. As such a vital component to your engine, you need to know every possible issue that can pop up, and how to properly clean them to ensure there are no repeat mistakes. Here are some of your most frequently asked questions about cleaning your fuel injectors.
What Fuel Injectors Do
Your fuel injector is a work of art. It is composed of a variety of components that work together to deliver very precise amounts of fuel into your engine.
Located near the top of the fuel injector near the fuel rail is the fuel filter basket which effectively traps larger particles present in fuel from passing through and clogging the injector’s pintle and seat. The injector body holds the different internal components of the injector together. The coil winding is what pulls the injector pintle up and away from the seat.
The pintle is like the gate valve of the fuel injector. When lifted by the coil winding, it exposes a gap between it and the seat. This gap is where fuel passes through. Now, do understand that the pintle doesn’t really move that much — only by a few thousandths of an inch. The seat is where the pintle rests when not raised by the coil winding. It forms a seal around the pintle so that fuel will not pass through. Together the pintle and seat are the fuel injector’s core elements as they determine the rate of flow of fuel as well as the spray pattern of the fuel.
Lastly, there’s the pintle cap which holds an O-ring, forming a seal and protecting the rest of the fuel injector from heat generated by the engine.
How Fuel Injectors Get Clogged Up
As gasoline or diesel fuel runs through the entire fuel system, carbon deposits naturally are left behind. Just like the drain in your kitchen sink sometimes gets clogged with food particles, so too do intake valves and combustion chambers get clogged with carbon deposits. The type of fuel you use can also impact how clean your fuel system is. Lower quality fuels often are mixed with water, which can rust the inside of your fuel system, leading to reduced fuel efficiency and degradation of the entire fuel system over time.
How to Clean Dirty Fuel Injectors
The easiest way to clean your fuel system is to use a fuel injection cleaner every 3,000 miles or so. The best fuel injector cleaners will remove the carbon build-up and restore your entire fuel system.
What do I Need to Clean My Injectors?
You need the following:
- The best Fuel injector cleaner for your vehicle
- Fuel pressure gauge
- Hose for attachment to fuel injector and rail
Nothing else is needed to do this on your own, though this is assuming you have basic tools on standby in case you encounter any other issues while attending to the fuel injectors. This is the perfect time to run a visual diagnostic on your vehicle and make a shortlist of maintenance tasks you need to complete, so you won’t be cleaning your injectors for no reason.
What does a fuel injector cleaner do?
A good fuel injection cleaner contains certain additives that get rid of gunk and build-up in the valves and combustion chamber of your vehicle’s engine. The additives are active ingredients that dissolve the deposits that are built up through your fuel injection system and then eliminates them through your vehicle’s exhaust system. They are fairly easy to use and can significantly improve the overall functionality of your fuel system. It can also help prevent any damage that carbon build-up may cause. Using fuel injector cleaners regularly leads to improved fuel efficiency in both gasoline and diesel engines.
When Should I Use a Fuel Injector Cleaner?
In most cases, you’ll see a lot of debates stating that you don’t need an injector cleaner or kit unless you encounter issues. In truth, preventative measures can offset 99% of all issues, so tending to this on a routine basis is strongly suggested.
You can expect to do a deep cleaning of your fuel injectors once a year, up to 30,000 miles. Anything over that, and it’s recommended to clean them again.
How do I Know if I Have a Clogged Fuel Injector?
There are a few ways to tell whether or not you have bad fuel injectors. These are the most obvious signs that you need to clean your fuel injectors:
Lowered Fuel Economy
If you have a digital meter in your car that displays your current MPG, pay attention to it at least once per ride. If you’re usually traveling the same routes, such as heading to and from work each day, you’ll get a firm understanding of what your MPG should be, both in and out of traffic, on and off of the highway. When you notice that there’s a significant decrease, such as 3-4 less MPG on your average, it could be an indicator of fuel economy problems.
This isn’t exclusive to fuel injector issues. Lower gas mileage can be a result of spark plug misfiring, bad air filters, incorrect tire pressure, and more. You shouldn’t immediately assume that your fuel injectors are the problem, but you also shouldn’t rule it out.
Forcing Your Engine
If you can feel that your engine doesn’t want to start, that you’re having issues every time you hop in the driver’s seat, you could have clogged injectors. Your injectors release a mist of gasoline, and when one or more aren’t firing properly, it gives unbalanced results. You should be able to hop in the car, twist the key, and be on your way with no worry.
Not Firing on All Cylinders
That phrase got its name from this issue; when your cylinders aren’t firing properly, you can hear it. Whether you have 4, 6, or 8 cylinders, you’ll be able to hear it. If you’ve recently opened up your hood and can visibly see gasoline on your spark plugs, you definitely have a clogged fuel injector.
How to Use a Fuel Injector Cleaner in Seven Easy Steps
After reviewing the layout of your specific make and model engine in your user’s manual, you should get everything ready and prepare to get your hands dirty. It’s recommended to wear gloves during this to avoid gasoline/oil absorption through your skin.
Start by disconnecting the fuel pump from the fuel injectors. This will require you to use a U-tube to ensure that gasoline returns to the tank, or the fuel return line. Some vehicles will have a different way to go about this depending on your make and model.
2. Disconnect the Pressure Regulator Vacuum Line
Normally, this is found slightly above your fuel injectors, though it will vary depending on your make and model. Be careful to keep the vacuum line perfectly intact upon removal, and lean it gently over the side of the hood.
Use that hose you have sitting by; connect it to the fuel pressure test port, and secure it tightly. Ensure there is no exposure to fuel of any kind by revisiting these steps and ensuring all parts are clear. Fuel injector cleaner is flammable; use caution.
4. Remove Fuel Tank Cap
This is a simple portion of the process — just be certain to put it somewhere you won’t lose it.
5. Turn the Car On
This is where it gets a little tricky. Turn your car on, but before you do this, be 100% certain that the fuel pump is off and then engage. The cleaner from your kit will begin to run through the engine. Within five to ten minutes, the engine will shut down when the cleaner has run its course. After this point, remove the cleaner tube.
Now, reattach the fuel pump power supply, as well as the pressure regulator hose, and then, reapply your fuel cap.
7. Quality Check
Turn your car back on to ensure the fuel injectors are reconnected and functioning properly. Drive it around the block for 5-15 minutes to really be certain. If you’re still noticing the same problems as before, and you know that your fuel injectors are clean as a whistle, you may need to replace them.
Easy Three-Step Process for Less Invasive Use
If you’re not too keen under the hood, or you just want to give your car a little TLC, you can still use some formulas of fuel injector cleaners without having to dissect an area of your car that you’re not familiar with.
1. Ensure Your Tank is Nearly Empty
You don’t want to dilute your solution in a full gas tank; ensuring that you have one gallon of gas or less is crucial to using this method.
2. Use the Appropriate Amount of Injector Cleaner
This is going to depend on the capacity of your gas tank. This is a good time to grab your owner’s manual and give it a read. Carefully read the instructions for the cleaner you’ve chosen, and match the recommended amount to the size of your tank.
Put the contents of your fuel injector cleaner of choice into the tank, add your regular fuel (this will push the cleaner through your injectors upon next startup), and you’re good to go.
Can Fuel Additives Help my Injectors?
Fuel additives can be helpful for numerous reasons, but if you’re storing your car for a long period of time – especially if you’re a proud owner of a vintage car that rarely comes out from under the tarp — you’ll want fuel injector additives.
These prolong the life expectancy of your fuel/oil, so you won’t have to worry about buildup or long-term corrosion. Fuel additives help keep your injectors lubricated and ready to go when you are.
Benefits of Clean, Fresh Fuel Injectors
Controlling Fuel Consumption – As mentioned before, you can notice a decrease in MPG if your fuel injectors aren’t clean. Doing a quick bit of math tells you that if you drive around with your fuel injectors coated in buildup and grime, an everyday commuter could see a savings of $52.50 per year, or 21 gallons of gas.
Decreased Metal-to-metal Friction – Your engine is a contraption of moving metal parts, each specifically lubricated to work with one another. Except, when buildup occurs, your engine ends up getting pretty nasty, and friction slowly chips away at the working parts of your motor.
Decreased Emissions — Under the same rule of increasing your fuel economy, you’ll produce less harmful emissions. It’s not a huge impact, but an impact nonetheless.
Q: Can Fuel Injector Cleaners Fix Leaks?
A: On their own, they cannot — if you find out you have a mainline leak, you’ll have to have a professional mechanic patch it up, or use oil additives (provided the leak is insignificant enough). The best fuel injector cleaners can help you locate a leak; during the cleaning process, when pressure builds and you’re already under the hood, you’ll be able to tell if there’s a leak, (especially if there’s gasoline on your spark plugs).
Q: Do Fuel Injector Cleaners Help Other Engine Functions?
A: While the primary focus is on your fuel injectors, they do help with a once-over for other parts of your engine. If you take a moment and use a rag, these cleaners can eliminate grime built-up around your gas cap (which you will have to remove during the cleaning process). They’re also about more than just cleaning the section where your injectors propel mist.
We would all like to believe that all fuel additives, which most of us use, do the trick in eliminating sediment buildup and slow down the production of grime. While they do help, it’s a fantasy to believe that they can do it all, and over long periods of time.
Fuel injector cleaner is able to cut through those stubborn chemical buildups and sludge in the engine. It’s not going to be a preventative measure for very long, but eliminating that residue from your engine and its moving parts can give you immediate benefits that would otherwise elude you.
Q: Are Fuel Injector Cleaners and Oil/Fuel Additives the Same Thing?
A: While some cleaners will have similar benefits to oil additives or fuel additives, they are not the same product. Additives are there to enhance your vehicle’s performance, while cleaners are simply optimizing the performance of your fuel by removing clogs from your internal parts. Think of them as two sides of the same coin – you want your additives to work properly, so you need clean injectors.
Q: After how many miles should fuel injectors be cleaned?
A: Everything actually depends on a variety of factors such as the age of your vehicle, the kind or types of fuel your engine uses, and the actual recommendation coming straight out of your vehicle’s owner’s manual. In addition to using additives, such as fuel injection cleaner, it is beneficial to also physically clean your fuel injectors.
As a general rule, the newer the car, the less frequent is the fuel injector cleaning. Conversely, the older the vehicle, the more frequent is the cleaning of the fuel injectors. One has to understand that as the engine burns fuel, deposits inadvertently build up inside the surfaces of the network of valves, tubes, and other contraptions in the vehicle’s fuel system. With the passing of time, more and more deposits typically build up and the engine also loses some of its efficiency in burning fuel. That being said, a newer vehicle will typically burn fuel at a slower rate compared to a vehicle with an older engine. Because engine efficiency is no longer optimal in older vehicles, they’ll need more frequent fuel injector cleaning.
High-octane fuels also tend to improve engine efficiency as well as power output, requiring sufficiently less cleaning of the fuel injectors. On the other hand, vehicles that run on low octane fuels may require more frequent cleaning.
Perhaps the best information on how many miles you should start cleaning your fuel injectors will be the one located in your owner’s manual. Different car manufacturers use different engine layouts and specifications that may play a role in the rate of deposit buildup. Generally, as the vehicle ages, there’s a commensurate increase in the frequency of cleaning.
Most car manufacturers recommend cleaning the fuel injectors after every 30,000 miles while others recommend after every 15,000 miles. Now, this is typically for the more tedious aspect of cleaning your fuel injectors. But if you’re going to use the hassle-free method of simply pouring the best fuel injector cleaner into your car’s fuel system, then everything actually depends on the purpose of the cleaning.
If the goal is to improve gas mileage and for general maintenance, lower doses of an appropriate cleaner placed with every other full tank is recommended. If your purpose is to solve minor issues and to provide a deeper clean in your fuel injectors, a higher dose of a stronger fuel injector cleaner can be added into your system every 3 to 6 months. If the goal is to address fuel injectors that are suspected of being clogged, you’ll need the largest dose of the strongest fuel injector cleaner to be added into your system once a year.
Q: What causes deposits and can they hurt my vehicle?
A: Deposits are nothing less than impurities present in the fuel that can lead to a variety of problems. It can actually be likened to human blood that circulates throughout the body. Impurities in the blood can sometimes accumulate to dangerous levels that they can form plugs inside the walls of blood vessels, impeding efficient blood flow.
In like manner, deposits that build up over time can lead to a host of problems such as lower gas mileage, hard starts, poor acceleration, engine knock or ping, loss of power, and even increased emissions. The problem actually depends on the location of deposits within the car’s fuel system.
If it is located inside the injectors, you may have issues with efficient fuel delivery leading to engine misfires, hesitation, rough idling, increased hydrocarbon emissions, and very bad fuel economy. A very lean fuel mixture can also lead to an increased risk of detonation. These deposits generally build up a lot faster with more frequent drive cycles and shorter trips as deposits form usually after the engine has been shut off.
Deposits can also form inside the throttle bottle often secondary to fuel vapors that emanate from the intake manifold, leading to rough idling.
If the intake valves form deposits, there can be a substantial loss of high-speed power or acceleration. These deposits usually result from normal products of combustion, although broken or leaking seals or valve guides can worsen or hasten the rate of deposit formation.
If the deposits form at the top of the pistons or even inside the combustion chamber, this can lead to a significant increase in the compression ratio. This inadvertently increases the need for a much higher octane fuel. If the commensurate increase in fuel octane is not achieved, there is a strong chance that detonation of spark knock can occur. If this is allowed to continue, the piston rings, head gasket, and even the rod bearings can get severely damaged leading to costly repairs. As a compensatory mechanism, the knock sensor will send signals to the PCM to delay the timing of the spark. Sadly, this can lead to increased emissions and definitely worse fuel consumption.
Similarly, combustion chamber deposits can lead to preignition problems that can seriously damage your engine. This is due to the formation of hot spots. What happens is that the hot spot delivers the unwanted spark to the fuel even before the actual spark is delivered by the spark plug. This results in a very steep increase in combustion pressure. Automotive experts say that preignition, given increased load and RPM, can burn a large gaping hole straight through the piston top.
In other words, the cleanliness and purity of your fuel need to be ensured, otherwise, these impurities can accumulate over time and bring you greater headaches than you could possibly ever imagine.
Q: If my mechanic has advised me to replace my fuel injectors, should I do it?
A: There really is no easy way to say this, but if it is your trusted mechanic telling you that you need to replace your fuel injectors, then maybe you should do it. However, it is often best to look at some of the signs of a failing fuel injector to help you have a fair idea of whether there really is a need to replace these important components of your car.
Engine knock or even detonation is almost always an indication of a failing fuel injection system. Rough engine performance as well as bucking and surging under different loads can also indicate a failing system. Poor performance, poor idle, increased fuel consumption, and increased smoke coming from your exhaust pipe are other signs. Issues with starting the engine and the engine not reaching its full RPM can also mean a bad fuel injector.
The point here is that don’t take your mechanic’s word for it. You’re the one driving your car on a daily basis. If you something off, then you can consult your manual as to the most likely cause of the problem or problems you’re experiencing. If everything points out to a failing fuel injector, then you can have it replaced.
Q: How do you properly store fuel injectors?
A: Fuel injectors, regardless of type, have only one common enemy – corrosion. This is because the internal components of fuel injectors are made from a variety of steel alloys. When exposed to the elements these can easily oxidize or rust. As soon as the fuel left inside the injectors dries out, the deposits that have built up inside can actually harden. This can lead to the pintle sticking to the injector’s seat. If this happens, you’ve got a very expensive piece of junk — inoperable. It may still operate, but what you’ll get is a leaky injector.
As such, if you do decide to take out your injectors with the hope of putting them back in after some time, you need to store them properly. This can be done by removing any dirt or debris that is present both inside and outside the injectors. Spray all surfaces with the appropriate lubricant before putting these in a sealed container or plastic bag. Store this someplace where it’s cool and dry.
Q: Is Sea Foam the same as a fuel injector cleaner?
A: Sea Foam is a brand that makes a lot of different products, including its clean fuel system cleaner and fuel injector cleaner. What they are most well known for is their Sea Foam Motor Treatment, which is one of the best fuel system cleaners on the market. The difference between their Motor Treatment products and fuel injector cleaners is that their Motor Treatment product is used throughout the entire fuel system in both gasoline and diesel engines. It works by liquifying any sludge, tar, or carbon deposits throughout the fuel system, making it easier to flush these contaminants out of the engine. As such, it pairs well with a fuel injection cleaner. Overall, using a fuel injection cleaner plus fuel system cleaner, like Sea Foam Motor Treatment, could significantly improve your vehicle’s performance.
Q: Can you put too much fuel injector cleaner in your car?
A: There are mixed reports about whether an excessive amount of fuel injector cleaner can cause damage to your engine. Some say that it could lead to overheating in your engine, causing certain parts to become damaged by the heat. Others say that some professional mechanics flush an entire fuel system by running a system cleaner and stabilizer without any gasoline at all. Given how extreme these two examples are, it’s safe to say that you won’t cause any damage to your engine if you make sure to follow the instructions on the bottle. Generally speaking, one bottle of fuel treatment is enough for one tank of gas.
Q: Can you put fuel injector cleaner in a full gas tank?
A: You can put fuel injector cleaners into a full tank of gas, though make sure to check the instructions on the bottle before doing so. It is generally advised to add fuel system cleaners to a nearly empty tank of gas so that the chemicals can fully mix with the fuel as you fill up your gas tank. Just a few gallons of fuel in the gas tank would be sufficient to add the cleaner to.
Q: How often should I use a fuel injector cleaner?
A: It is recommended to use a fuel system cleaner every 3,000 miles for most gasoline engines. This will keep your engine clean, increase fuel efficiency, and improve the vehicle’s performance overall. For daily commuters, this could be anywhere from every three months to every six months. No matter how frequently you drive, though, it’s safe to use fuel injector cleaner every 3,000 miles to 5,000 miles.
Q: Can I use the same fuel injector cleaner on a gasoline and diesel engine?
A: Some of the best fuel injector cleaners can be used both on gasoline engines as well as diesel engines. Some, however, are more specifically designed for a certain type of fuel. For example, the Chevron with Techron Concentrate Plus Fuel System Cleaner works well with all types of vehicles, from cars to motorcycles to trucks and more. However, it is not meant to be used with diesel engines. This is because a fuel system cleaner designed for only one type of fuel will have a specific chemical formula to address exactly the kinds of deposits created by the type of fuel it’s targeting. So if you want the best fuel injector cleaner for your car, then find one that is specifically designed to work with the type of fuel that you use.