10 bestEngine Additivesof March 2026
112M consumers helped this year.
1
Red Line (60103) Complete SI-1 Fuel System Cleaner - 15 Ounce
Red Line
9.9
2
Lucas 10013 Fuel Treatment - 1 Gallon
Lucas Oil
9.8
3
Liqui Moly 2020 Motor Oil Saver - 300 ml
Liqui Moly
9.5
4
Liqui Moly 2009 Anti-Friction Oil Treatment-pk4
Liqui Moly
9.2
5
*H/D Oil Stabilizer/4x1/Gallon
Lucas Oil
9.0
OtherUp to 13% off
Lucas Oil 10063 Engine Break-In Oil Additive - 16 oz
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
Chevron 266373272 Techron D Concentrate Diesel Fuel System Cleaner, 20 fl. oz., 1 Pack
Marvel Mystery Oil MM12R - 16 Fl Oz. (Pack of 2)
6
3 cans of BG EPR Engine Performance Restoration
BG(0002698761)
8.7
7
Bg Products MOA & EPR Motor Oil Additive Lubrication Supplement Engine Restore
BG(0002698761)
8.4
8
Lucas Oil 10279 Engine Oil Stop Leak - 1 Gallon
Lucas Oil
8.1
13% off
9
Liqui Moly (20002) Cera Tec Friction Modifier - 300 ml
Liqui Moly
7.8
10
STA-BIL Fast Fix Small Engine Treatment - Cleans Carbs and Injectors - Fixes Rough Running Engines - Eliminates Water - Treats 10 Gallons, 4 fl. oz. (22303)
STA-BIL
7.5
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