10 bestFuel Additivesof June 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
Klotz Higher Octane Booster, Multipurpose Fuel Additive for Gasoline – 4 Pack of 6-Ounce Bottles
Klotz
9.3
4
BG Products 44K Fuel System Cleaner - 3 Pack
B&G
9.0
15% off
5
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
8.8
8% off
6
STP 78574-12PK Octane Booster - 5.25 fl. oz., (Pack of 12)
STP
8.5
15% off
7
Gumout 30001 All-in-One Fuel System Cleaner 296ml
Gumout
8.2
5% off
8
Marvel Mystery Oil MM13R-6PK - 32 Fl Oz. (Pack of 6)
Marvel Mystery Oil
7.9
9
Lucas Oil 10080 Upper Cylinder Lube/Fuel Treatment - 5 Gallon Pail
Lucas Oil
7.6
10
Royal Purple 11722 Max-Clean Fuel System Cleaner and Stabilizer, 20-Ounce Bottle
Royal Purple
7.3
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