Best Engine Cleaner Additive: image
Editor's Pick

& FUEL MILEAGE OF UPPER CYLINDERS, INCREASED FUEL ECONOMY BY 7.9% (verified by 3rd party testing). The new scheme will also help to reduce carbon dioxide emissions. It is expected that the scheme will be extended to other states in the next three years. Further, it has been suggested that the scheme could be extended to all states.

Value for Money

Engine, AFC-705 Ultra Premium Fuel Additive has been developed to reduce the amount of harmful gases produced by combustion. The additive is formulated to prevent the formation of carbon deposits in the fuel and prolongs its life. It can also be used as a pre-treatment agent for diesel engines. Notably, it was approved by the National Institute of Standards (NIST) in 2015. Further, the additive has been tested on diesel engines.

Honorable Mention

The world’s best-performing fuel additive, Red Line complete SI-1 fuel system cleaner, is designed to improve the performance of petrol and diesel engines. The product has a shelf life of up to 10 years and can be used in any engine or gearbox. It contains no harmful chemicals and is non-toxic. Not only that, but it also reduces carbon monoxide emissions by over 70%. Red Line products have been tested under strict quality control procedures. No compromises were made in testing.

Best Engine Cleaner Additive

Top 8 Best Engine Cleaner Additive

1
Why we chose it
  • DESIGNED TO EXCEED EXPECTATIONS: Red Line complete SI-1 fuel system cleaner treatment for cleaning and preventing corrosion in fuel systems
  • EFFICIENT FUEL BURN: Gas treatment that enhances gasoline stability, while reducing the build up of gum and varnish formation
  • EASY TO USE: Use one bottle per tank for most effective treatment, additive cleans nearly 100% efficiency in one treatment
  • PERFORM AND PROTECT: Fuel additive cleans injectors, carburetors, valve and combustion chamber deposits with a powerful, concentrated blend of high-temp and low-temp detergents
Red Line (60103) Complete SI-1 Fuel System Cleaner - Gas and Injector Additive Treatment - 15 Oz Bottle: image
92%
customers recommend this product
4.6/ 5
Easy to use5
Accuracy4.4
Value for money4.3
Mileage4.2
2
Why we chose it
  • Maximizes engine performance by eliminating carbon deposits
  • For use in all 2 and 4 cycle carbureted and fuel injected gasoline engines
  • 32 ounce bottle
  • Prevents engine knocking
  • Extends spark plug life
Quicksilver 8M0058681 Quickleen Engine and Fuel System Cleaner - 32 Ounce Bottle: image
96%
customers recommend this product
4.8/ 5
3

Rislone Engine Treatment,Pack of 1,100QR

643 ratings | 12 offers | 643 Reviews
Price: $6.2$25.94
Why we chose it
  • Frees valves and lifters
  • Reduces friction and wear
  • Maintains oil viscosity
  • Cleans and conditions engines
  • Dissolves and removes harmful deposits
Rislone Engine Treatment,Pack of 1,100QR: image
90%
customers recommend this product
4.5/ 5
Value for money4.5
Mileage4.5
4
Why we chose it
  • Fuel Stabilizer
  • Cold Weather Additive
  • Diesel Additive
  • Injector Cleaner
  • Gasoline Additive
Total Power TPx Synthetic Fuel Additive for Gasoline and Diesel - Stabilizer, Injector Cleaner, Multi-Purpose. 16 oz Bottle: image
100%
customers recommend this product
5/ 5
5
Why we chose it
  • BETTER ENGINE PERFORMANCE: help clean the fuel injection system, as well as the cylinders, improving overall performance.
  • LOWER EMISSION LEVELS: can lower your total hydrocarbon emissions by up to 50 percent.
  • REDUCE FUEL CONSUMPTION & BAD SMELL: while cutting down on fuel consumption, it also gets rid of the icky smell developed by your car overtime.
  • PROTECT ENGINE: Proper fuel and exhaust flow will keep that engine running cleaner, smoother, and better, which will also cut down on maintenance costs.
  • CLEAN THE ENTIRE SYSTEM: it can also clean other parts like the oxygen sensor, the fuel injectors, cylinder heads, and others.
Fuel System Cleaner Catalytic Converter Cleaner Engine Booster Cleaner (1pcs): image
74%
customers recommend this product
3.7/ 5
Top Pick
6

Hot Shot’s Secret Gasoline Extreme 1 Quart Bottle

229 ratings | 2 offers | 229 Reviews
Price: $28.99$51.18
Why we chose it
  • STABILIZES ETHANOL, SMOOTHS IDLE, DISSOLVES GUMS & VARNISH
  • LUBRICATES & CLEANS: VALVES, PUMPS, INJECTORS, RINGS, PISTONS, & UPPER CYLINDERS
  • REMOVES COMBUSTION CHAMBER DEPOSITS
  • INCREASES FUEL ECONOMY BY 7.9% (verified by 3rd party testing)
  • RESTORES PERFORMANCE, POWER & FUEL MILEAGE
Hot Shot's Secret Gasoline Extreme 1 Quart Bottle: image
96%
customers recommend this product
4.8/ 5
Value for money4.7
Mileage4.3
7
Why we chose it
  • ELIMINATES ROUGH IDLE & STARTUP ensuring smooth performance Decreasing engine surge, hesitation, and spark plug fouling
  • INCREASES HORSEPOWER & FUEL ECONOMY with a combustion catalyst Giving you more energy from every drop of fuel Reducing harmful emissions produced from unburnt fuel
  • STABILIZES FUEL for up to 12 months Maintaining fuel quality for longer periods of time Eliminating the need to drain before storage.
  • EXTENDS ENGINE LIFE with a lubricity enhancer and corrosion inhibitor Reducing wear on moving parts Preventing engine and tank corrosion
  • CLEANS ENTIRE FUEL SYSTEM (injectors, combustion chamber, etc.) Removing & preventing carbon deposits, gum, and varnish Dissolving contaminants & particulates that develop in the tank Extending engine filter life
AFC-705 (8oz) Ultra Premium Fuel Additive - 320 Gallon Treatment - Enhances & Stabilizes Fuel – Complete Fuel System Cleaner – for Diesel & Gas Use: image
86%
customers recommend this product
4.3/ 5
8

Quicksilver Quickleen Engine and Fuel System Cleaner

240 ratings | 7 offers | 240 Reviews
Price: $14.71$19.49
Why we chose it
  • Maximize engine performance with all grades of gasoline
  • Can be used at every fuel tank fill-up.One ounce treats five gallons of gasoline.
  • Extends spark plug life.
  • Quickly and thoroughly removes carbon deposits from carburetors, injectors, intake valves, spark plugs, piston crowns and cylinder heads.
  • Produced by Mercury Marine to our stringent original equipment manufacturer specifications to maximize the performance of gasoline fueled engines.
  • See your owner’s manual or service manual for specific applications and instructions.
  • Prevents engine knocking and piston seize-up.
Quicksilver Quickleen Engine and Fuel System Cleaner: image
94%
customers recommend this product
4.7/ 5
Ranking the Brands
Red Line: 12.50%
: 37.50%
Rislone: 12.50%
Total Power: 12.50%
Hot Shot’s Secret: 12.50%
AFC Fuel Additives: 12.50%

Comparison Table

Сomparison: Red Line (60103) Complete SI-1 Fuel System Cleaner - Gas and Injector Additive Treatment - 15 Oz Bottle: imageСomparison: Quicksilver 8M0058681 Quickleen Engine and Fuel System Cleaner - 32 Ounce Bottle: imageСomparison: Rislone Engine Treatment,Pack of 1,100QR: imageСomparison: Total Power TPx Synthetic Fuel Additive for Gasoline and Diesel - Stabilizer, Injector Cleaner, Multi-Purpose. 16 oz Bottle: imageСomparison: Fuel System Cleaner Catalytic Converter Cleaner Engine Booster Cleaner (1pcs): imageСomparison: Hot Shot's Secret Gasoline Extreme 1 Quart Bottle: imageСomparison: AFC-705 (8oz) Ultra Premium Fuel Additive - 320 Gallon Treatment - Enhances & Stabilizes Fuel – Complete Fuel System Cleaner – for Diesel & Gas Use: imageСomparison: Quicksilver Quickleen Engine and Fuel System Cleaner: image
Red Line (60103) Complete SI-1 Fuel System Cleaner – Gas and Injector Additive Treatment – 15 Oz BottleQuicksilver 8M0058681 Quickleen Engine and Fuel System Cleaner – 32 Ounce BottleRislone Engine Treatment,Pack of 1,100QRTotal Power TPx Synthetic Fuel Additive for Gasoline and Diesel – Stabilizer, Injector Cleaner, Multi-Purpose. 16 oz BottleFuel System Cleaner Catalytic Converter Cleaner Engine Booster Cleaner (1pcs)Hot Shot’s Secret Gasoline Extreme 1 Quart BottleAFC-705 (8oz) Ultra Premium Fuel Additive – 320 Gallon Treatment – Enhances & Stabilizes Fuel – Complete Fuel System Cleaner – for Diesel & Gas UseQuicksilver Quickleen Engine and Fuel System Cleaner
ManufacturerRed LineRisloneTotal Power, Inc.Hot Shot’s SecretAFC Fuel Additives
BrandRed LineRisloneTotal PowerHot Shot’s Secret
Item Weight1.58 ounces1.96 pounds9.6 ounces
Is Discontinued By ManufacturerNoNoNoNoNo

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