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 Chevron Techron Concentrate Plus Fuel System Cleaner is the one of the Best Engine Cleaner Additive on the market.

# Image Name Brand Price
1
⭐Best Choice
Chevron Techron Concentrate Plus Fuel System Cleaner
Chevron Techron Concentrate Plus Fuel System Cleaner - 20 oz. Check price Chevron $$$$$ Check price
2 Liqui Moly 2037 Pro-Line Engine Flush Liqui Moly 2037 Pro-Line Engine Flush - 500 Milliliters Check price Liqui Moly $$$$$ Check price
3 Sea Foam SF-16-2PK Motor Treatment Multi-Use Sea Foam SF-16-2PK Motor Treatment Multi-Use, 16 Ounce, Pack of 2, 16. Fluid_Ounces Check price Sea Foam $$$$$ Check price
4
👑Premium Pick
LUCAS LUC10013 Fuel Treatment
LUCAS LUC10013 Fuel Treatment, 1. gallons Check price LUCAS $$$$$ Check price
5
💲Best value for the money
Gumout 510011 Multi-System Tune-Up
Gumout 510011 Multi-System Tune-Up, 16 oz. Check price Gumout $$$$$ Check price
6 Marvel Mystery Oil MM12R Marvel Mystery Oil MM12R - 16 Fl Oz. (Pack of 2) Check price Marvel Mystery Oil $$$$$ Check price
7 STA-BIL 22303 Small Engine Fuel System Cleaner STA-BIL 22303 Small Engine Fuel System Cleaner, 4. Fluid_Ounces Check price STA-BIL $$$$$ Check price
8 Royal Purple 18000 Max Atomizer Fuel Injector Cleaner Royal Purple 18000 Max Atomizer Fuel Injector Cleaner - 6 oz. Check price Royal Purple $$$$$ Check price
9 Lucas Oil 10512 Deep Clean Fuel System Cleaner Lucas Oil 10512 Deep Clean Fuel System Cleaner - 16 oz. Check price Lucas Oil $$$$$ Check price
10 Star Tron Enzyme Fuel Treatment Star Tron Enzyme Fuel Treatment - Concentrated Gas Formula 8 oz - Treats 128 Gallons Check price Star Brite $$$$$ Check price

Chevron Techron Concentrate Plus Fuel System Cleaner – Best Overall Engine Cleaner Additive

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.)

Liqui Moly 2037 Pro-Line Engine Flush

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

Sea Foam SF-16-2PK Motor Treatment Multi-Use

Sea Foam SF-16-2PK Motor Treatment Multi-Use
  • Dissolves and clean fuel deposits and sticky residues from gas and diesel fuel injectors, carburetors, and combustion chambers
  • Stabilizes stored fuel for up to two year
  • Does NOT have harsh detergent or abrasive chemicals that can harm your engine

LUCAS LUC10013 Fuel Treatment – Premium Pick

LUCAS LUC10013 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 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

STA-BIL 22303 Small Engine Fuel System Cleaner

STA-BIL 22303 Small Engine Fuel System Cleaner
  • Fixes poor/non-running engines by eating the gum and varnish that causes rough starts, or no starts
  • Fixes issues caused by ethanol blended fuels
  • Cleans the entire fuel system - Simultaneously cleans injectors/carburetors while cleaning the rest of the fuel system
  • Prevents the need to disassemble the engine and is compatible with ALL small engines
  • Treats 10 gallons

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

Lucas Oil 10512 Deep Clean Fuel System Cleaner

Lucas Oil 10512 Deep Clean Fuel System Cleaner
  • Features And Benefits: Greatly Reduces Harmful NOx Emissions
  • These Are Complete Line Of Heavy-Duty Shop Products
  • Through Creativity, Productivity And Innovation - This Brand Continues To Develop The Finest Automotive Accessories

Star Tron Enzyme Fuel Treatment

Star Tron Enzyme Fuel Treatment
  • Cures and prevents ethanol fuel problems; helps prevent phase separation
  • For everyday use and seasonal storage; stabilizes fuel for up to 2 years and can help rejuvenate old, sub-spec fuel
  • Makes engines start easily and run smoothly; improves fuel economy and reduces emissions
  • Cleans valves and injectors of carbon deposits, gums and varnish for maximum performance, increased fuel efficiency and reduced emissions
  • Concentrated formula #930XX is economical to use in large and small applications; safe for use in all engines (including 2-cycle pre-mix)

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