Top 7 Best Engine Cleaners – (Updated List 2021 )


Your vehicle whether it be a car, truck or motorcycle or other machines with motors that run on gasoline need to be cleaned periodically. The internal combustion engine is a closed system and the fuel goes in and after it burns to produce the motion within the engine there are little tiny deposits that are left on many of the internal parts of the engine. Over time the build-up of these once tiny deposits starts to add up and the overall performance of the engine will begin to suffer.

The answer to this dilemma is to use an engine cleaner additive to the gasoline. These cleaners contain powerful agents that work at the molecular level to break down the deposits that have been building up over time on the internal parts of your engine. By following the directions on the package and adding a bottle of an engine cleaner to your tank full of gasoline, you can help restore the performance of your vehicle.

As part of our preparation for this article we searched online and found a number of engine cleaners that are available from a number of manufacturers. We put together a list of our best engine cleaner. Along with that we also included a number of engine cleaner reviews in order to provide you with much more information that we hope will make it possible for you to make an informed decision on which one is right for your vehicle.

Chevron 65740 Fuel System Cleaner – 20 oz.


The Techron brand name and Chevron are well known in the auto industry and their products have been used by millions of vehicle owners to keep their fuel systems running at peak performance. By adding a bottle of Techron 65740 concentrated fuel cleaner according to the directions on the bottle it will help remove much of the harmful deposits that have been left on the vital engine parts.

By working at the molecular level the cleaners inside every drop of Techron work to break down the gooey deposits left on valves, pistons and inside the walls of the combustion chamber from the gasoline being burnt. These harmful deposits over time will cause your engine to lose performance and cause a number of other unwanted results.

Just a single bottle of Chevron Techron 65740 can reverse the damage left behind by poor quality gasoline and restore your vehicle’s performance.

Cataclean 473ml Engine and Catalytic Converter Cleaning Treatment


The Catalytic Converter is an important part of your vehicle’s powertrain and keeping it and all of the internal parts of your vehicle’s engine is very important. Cataclean Engine and Catalytic Converter cleaner were designed especially to help restore your engine’s performance from the inside. The chemicals inside the cleaner help to break down the performance-robbing deposits that occur when the burning of the fuel inside of a combustion engine.

By adding a single 472ml bottle of Cataclean to your next full tank of fuel you can begin to notice the benefits of removing those harmful deposits from the valves and other parts of the engine and your vehicle’s exhaust emissions will decrease as the deposits from the catalytic converter are eliminated. That would be a huge plus for the environment, not to mention the performance of your vehicle.

Cataclean and Catalytic Treatment is a total engine treatment system and will definitely help to restore your vehicle’s missing performance.

Oil Eater Original 1 Gallon Cleaner/Degreaser


The outside of a vehicle’s engine also can become gunk up with a number of different substances that can be extremely unsightly. Some of these substances can also be the cause of other systems in your vehicle not to function properly. Just like the inside of your engine needed periodic cleaning, so does the outside and the rest of the engine compartment located under the hood. With so many different types of liquids that are found under the hood and with the fact that water is sprayed up inside when it rains, it is no wonder that the engine and whole compartment gets pretty grimy.

By using a cleaner and degreaser is the most effective way to remove many types of grime and grease that can accumulate on the engine. Oil Eater is formulated to cut through and dissolve even the toughest stains. It is formulated using totally biodegradable ingredients that won’t harm the surrounding ecosystem. It is also safe enough to use around the house to remove tough grime and other stains. By following the diluting table on the side of the bottle, you can easily use Oil Eater to get your vehicle’s engine clean. It is highly recommended that you use a pressure washer to ensure that you are able to get the really tough grime out.

Oil Eater Original 1 Gallon Cleaner/Degreaser is a huge value as that it can be used for a number of different cleaning jobs.

BestLine Premium Synthetic Engine Treatment for Gasoline Engines  – 853796001049


Friction is one of the biggest causes of wear and tear on the internal parts of a combustion engine. This friction occurs when metal parts rub together without any type lubrication. The heat and wear can cause parts to fail prematurely and that can cause major problems with the engine. Best Line Premium Synthetic Engine treatment is designed to eliminate as much of the friction as possible.

The formula contains a number of synthetic compounds that are capable of cleaning and coating all metal surfaces inside the engine. By leaving a coating on the parts the rub together there is far less likely to be damaged by excessive heat and friction. This also helps to restore lost performance that will decline as it gets more and more worn. It also can help improve exhaust emissions in older vehicles.

BestLine Premium Engine Treatment for Gasoline Engines is perfect for any vehicle with a gasoline-powered engine.

Liqui Moly 2037 Pro-Line Engine Flush – 500 Milliliters


Most car makers recommend that you change the engine oil in your vehicle periodically and depending on the manufacturer it can range from 3000 miles up to 10000 miles. However, that is only part of the story, you really should do a complete oil system flush as well. This helps to clean out any debris and deposits that accumulate throughout the oil system and should be removed.

The powerful formula inside Pro-Line Engine flush is capable of removing harmful sludge and other deposits inside the engine oiling system without causing any damage to gasket materials. By following the directions on the package it is really easy to use and should be used prior to a scheduled oil change. Can be used will all types of engine oils currently on the market and will not damage your vehicle’s catalytic converter.

The Liqui Moly 2037  is the perfect product for keeping your vehicle’s engine running smoothly.

Sea Foam SS14 Cleaner and Lube


Sea Foam Cleaner and Lube is a high-quality compound that you spray directly into the engine through one of the engine fuel injectors. This allows the powerful petroleum-based cleaner and lubricator to clean and coat the entire top section of the engine. This includes the combustion chamber, the injectors, valves, pistons, and heads.

The Powerful formula created by Sea Foam helps to restore your engine’s performance by removing harmful sludge. The lubricant left behind helps to reduce the friction associated with metal parts rubbing together. It also can be used on engines large and small that are being prepared to be stored for a long period of time. This process is referred to as fogging and it helps to eliminate the possibility of corrosion and freeze ups while the engine is idle.

Sea Foam SS14 Cleaner and Lube is a versatile product that both cleans and lubricates the internal parts of an internal combustion engine.

Chemical Guys CLD_101_16 


All Clean+ is a high-quality multi-surface cleaner that is extremely effective against engine compartment grime and stains. Its all-natural formula includes the power of citrus which means that it can also be used on surfaces inside the car. It features a highly concentrated formula that means it can be used straight or diluted according to the table on the packaging.

The powerful citrus-based formula is super effective on a wide range of stains and it can be used on a variety of materials inside and out of the vehicle. It helps to recondition the material after the stains have been removed. While it is powerful enough to be used throughout the engine compartment, it is gentle enough to use on plastics as well.

Chemical Guys Super Cleaner is a highly versatile cleaner that can be used on most surfaces of your vehicle.

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