10 bestEngine Additivesof June 2026
112M consumers helped this year.
7% off
1
Red Line 60103 Complete SI-1 Fuel System Cleaner, 15 Ounce, 1 Bottle
Red Line
9.7
15% off
2
Lucas 10013 Fuel Treatment - 1 Gallon
Lucas Oil
9.4
6% off
3
3 cans of BG EPR Engine Performance Restoration
BG
9.1
15% off
4
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
5
Liqui Moly 2009 Anti-Friction Oil Treatment-pk4
Liqui Moly
8.6
OtherUp to 6% off
Bg Products MOA & EPR Motor Oil Additive Lubrication Supplement Engine Restore
STA-BIL Fast Fix - Small Engine Treatment, Cleans Carburetors and Injectors, Fixes Rough Running Engines, Eliminates Water, Treats Up to 20 Gallons, 8oz (22304), Green
Marvel Mystery Oil MM12R - 16 Fl Oz. (Pack of 2)
*H/D Oil Stabilizer/4x1/Gallon
11% off
6
Engine Oil Stop Leak/4x1/Gallon
Lucas Oil
8.3
7
Liqui Moly 20004 Hydraulic Lifter Additive
Liqui Moly
8.0
8
Marvel MM13R Mystery Oil - 32 oz.
Marvel
7.7
9
Liqui Moly (20002) Cera Tec Friction Modifier - 300 ml
Liqui Moly
7.4
12% off
10
Lucas Oil 10063 Engine Break-In Oil Additive - 16 oz
Lucas Oil
7.1
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