10 bestFuel Additivesof July 2026
112M consumers helped this year.
1
Red Line 60103 Complete SI-1 Fuel System Cleaner, 15 Ounce, 1 Bottle
Red Line
9.8
2
Lucas 10013 Fuel Treatment - 1 Gallon
Lucas Oil
9.6
3
STP 78574-12PK Octane Booster - 5.25 fl. oz., (Pack of 12)
STP
9.3
4
Klotz Higher Octane Booster, Multipurpose Fuel Additive for Gasoline – 4 Pack of 6-Ounce Bottles
Klotz
9.0
15% off
5
Gumout 30001 All-in-One Fuel System Cleaner 296ml
Gumout
8.7
6
Liqui Moly 2030 Pro-Line Fuel System Cleaner, 500 ml
Liqui Moly
8.4
7
Royal Purple 11722 Max-Clean Fuel System Cleaner and Stabilizer, 20-Ounce Bottle
Royal Purple
8.1
14% off
8
STA-BIL Fast Fix - Small Engine Treatment, Cleans Carburetors & Injectors, Fixes Rough Running Engines, Eliminates Water, Carb Cleaner & Fuel Injector Cleaner Treats Up to 10 Gallons, 4oz
STA-BIL
7.8
9
BG 44K Fuel System Cleaner Power Enhancer 4 Pack 11oz can
BG
7.5
10
BG 44K Fuel System Cleaner
BG
7.3
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