10 Best Engine Cleaner Additives

After analyzing products, scanning reviews, spending more than 36 hours of research and speaking with our test users, we think the Liqui Moly 2037 Pro-Line Engine Flush is the one of the Best Engine Cleaner Additive on the market.

# Image Name Brand Price
1
⭐Best Choice
Liqui Moly 2037 Pro-Line Engine Flush
Liqui Moly 2037 Pro-Line Engine Flush - 500 Milliliters Check price Liqui Moly $$$$$ Check price
2 Chevron Techron Concentrate Plus Fuel System Cleaner Chevron Techron Concentrate Plus Fuel System Cleaner - 20 oz. Check price Chevron $$$$$ Check price
3 LUCAS LUC10013 1 Gallon (128 Ounces) Fuel Treatment LUCAS LUC10013 1 Gallon (128 Ounces) Fuel Treatment Check price LUCAS $$$$$ Check price
4 Gumout 510019 Fuel Injector Cleaner Gumout 510019 Fuel Injector Cleaner, 6 oz. (Pack of 6) Check price Gumout $$$$$ Check price
5
💲Best value for the money
Gumout 510011 Multi-System Tune-Up
Gumout 510011 Multi-System Tune-Up, 16 oz. Check price Gumout $$$$$ Check price
6 Marvel Mystery Oil MM12R Marvel Mystery Oil MM12R - 16 Fl Oz. (Pack of 2) Check price Marvel Mystery Oil $$$$$ Check price
7 Gumout 510013 High Mileage Fuel Injector Cleaner Gumout 510013 High Mileage Fuel Injector Cleaner, 6 oz. (Pack of 6) Check price Gumout $$$$$ Check price
8
👑Premium Pick
Chevron 9280-6PK Techron Fuel Injector Cleaner
Chevron 9280-6PK Techron Fuel Injector Cleaner - 20 oz. (Pack of 6) Check price Chevron $$$$$ Check price
9 Marvel Mystery Oil 50665 Ultimate Fuel and Motor Treatment Marvel Mystery Oil 50665 Ultimate Fuel and Motor Treatment - 12 Fl Oz. Check price Marvel Mystery Oil $$$$$ Check price
10 Royal Purple 18000 Max Atomizer Fuel Injector Cleaner Royal Purple 18000 Max Atomizer Fuel Injector Cleaner - 6 oz. Check price Royal Purple $$$$$ Check price

Liqui Moly 2037 Pro-Line Engine Flush – Best Overall Engine Cleaner Additive

Liqui Moly 2037 Pro-Line Engine Flush
  • Easy way to clean and flush the oil systems of gasoline and diesel engines
  • Gentle and rapid cleaning
  • Neutral to seals and other materials installed in the engine
  • Compatible with catalytic converters
  • Simple to use

Chevron Techron Concentrate Plus Fuel System Cleaner

Chevron Techron Concentrate Plus Fuel System Cleaner
  • Cleans, restores, protects the entire fuel system (fuel injectors, carburetors, intake valves and combustion chambers)
  • Restores: lost power, acceleration, lost fuel economy, and operation of the fuel gauge sensor
  • Reduces: rough idle, engine surge, hesitation, and spark plus fouling
  • Improves: cold start performance, and fuel stability for up to one year
  • Automobiles and trucks use every 3,000 miles or at your next oil change. All other gasoline engines use as needed (motorcycles, dirt bikes, boats, ATVs, RVs, water craft, lawn care, etc.)

LUCAS LUC10013 1 Gallon (128 Ounces) Fuel Treatment

LUCAS LUC10013 1 Gallon (128 Ounces) Fuel Treatment
  • Cleans and lubricates the fuel system. Neutralizes low sulfur fuel problems
  • Increases power and miles per gallon by burning excess exhaust emissions
  • Made in USA
  • Increases the life of pumps and injectors

Gumout 510019 Fuel Injector Cleaner

Gumout 510019 Fuel Injector Cleaner
  • Removes carbon deposits from key engine parts
  • Prevents future carbon buildup on port/indirect fuel injectors, intake valves, and ports
  • Maximizes engine performance and fuel economy
  • Reduces emissions
  • Oxygen sensor safe and safe for use in turbocharged and supercharged vehicles

Gumout 510011 Multi-System Tune-Up – Best Budget Engine Cleaner Additive

Gumout 510011 Multi-System Tune-Up
  • Use in gas, ethanol/flex fuel, diesel & biodiesel engines
  • Restores fuel economy and improves engine performance
  • PEA (polyetheramine) effectively removes carbon deposits from the entire fuel & oil systems
  • Stabilizes fuel and oil for up to 2 years
  • Helps pass emissions testing, Lubricates upper cylinders, and Fights ethanol related rust & corrosion

Marvel Mystery Oil MM12R

Marvel Mystery Oil MM12R
  • Kit Includes (2) 16oz. Bottles of Marvel Mystery Oil additive
  • Cleans and lubricates fuel injectors and carburetors
  • Reduces and prevents varnish and gum build-up
  • Prevents valve sticking and clatter
  • Prevents oil breakdown caused by extreme temperatures

Gumout 510013 High Mileage Fuel Injector Cleaner

Gumout 510013 High Mileage Fuel Injector Cleaner
  • Specially formulated to remove carbon deposits from engines with over 75, 000 miles
  • Cleans fuel injectors, intake valves, and ports to restore performance and fuel economy
  • Prevents future carbon build-up and reduces emissions
  • Oxygen sensor safe and safe for use in turbocharged and supercharged vehicles
  • Will not void OEM/manufacturer's

Chevron 9280-6PK Techron Fuel Injector Cleaner – Premium Pick

Chevron 9280-6PK Techron Fuel Injector Cleaner
  • Cleans clogged fuel injectors that can cause hesitation or loss of power
  • Can help restore lost fuel economy
  • This product will not contribute to deposit-related engine knock, ping and run-on
  • Safe for catalytic converters and oxygen sensors
  • Works in one tankful, while you drive

Marvel Mystery Oil 50665 Ultimate Fuel and Motor Treatment

Marvel Mystery Oil 50665 Ultimate Fuel and Motor Treatment
  • Use in all engines including GDI & Hybrids
  • Marvel Ultimate Fuel & Motor Treatment removes up to 99% more deposits than gasoline alone
  • Prevents rust and corrosion from ethanol containing fuels
  • Advanced engine technology stabilizes fuel for months and helps promote easy start-ups
  • Provides top end lubrication, essential for restoring power and fuel economy

Royal Purple 18000 Max Atomizer Fuel Injector Cleaner

Royal Purple 18000 Max Atomizer Fuel Injector Cleaner
  • Restores fuel economy
  • Stabilizes ethanol
  • Maximizes horsepower
  • Improves responsiveness
  • For use in both gasoline and diesel engines

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