We use cookies to enhance the security, performance, functionality and for analytical and promotional activities. We use cookies to personalize ads for you. By continuing to browse this site you're agreeing to our Privacy PolicyWe use cookies to enhance your experience and personalize ads. By using the site, you agree to that. Privacy Policy

10 bestEngine Additivesof November 2025

112M consumers helped this year.

1

Lucas 10013 Fuel Treatment - 1 Gallon
Lucas 10013 Fuel Treatment - 1 Gallon

Lucas Oil

9.8

View Product
Buy it on Amazon

2

Liqui Moly 2020 Motor Oil Saver - 300 ml
Liqui Moly 2020 Motor Oil Saver - 300 ml

Liqui Moly

9.6

View Product
Buy it on Amazon

6% off

3

Liqui Moly 2009 Anti-Friction Oil Treatment-pk4
Liqui Moly 2009 Anti-Friction Oil Treatment-pk4

Liqui Moly

9.5

View Product
Buy it on Amazon

4

Liqui Moly 20004 Hydraulic Lifter Additive
Liqui Moly 20004 Hydraulic Lifter Additive

Liqui Moly

9.3

View Product
Buy it on Amazon

5

*H/D Oil Stabilizer/4x1/Gallon
*H/D Oil Stabilizer/4x1/Gallon

Lucas Oil

9.1

View Product
Buy it on Amazon

Related productsUp to 19% off

Bg Products MOA & EPR Motor Oil Additive Lubrication Supplement Engine Restore

Bg Products MOA & EPR Motor Oil Additive Lubrication Supplement Engine Restore

View Deal
Marvel Mystery Oil MM12R - 16 Fl Oz. (Pack of 2)

Marvel Mystery Oil MM12R - 16 Fl Oz. (Pack of 2)

View Deal
Lucas Oil 10016 Complete Engine Treatment - 16 fl oz

Lucas Oil 10016 Complete Engine Treatment - 16 fl oz

View Deal
Lucas Oil 10063 Engine Break-In Oil Additive - 16 oz

Lucas Oil 10063 Engine Break-In Oil Additive - 16 oz

View Deal

6

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 Fast Fix Small Engine Treatment - Cleans Carbs and Injectors - Fixes Rough Running Engines - Eliminates Water - Treats 10 Gallons, 4 fl. oz. (22303)

STA-BIL

8.9

View Product
Buy it on Amazon

7

Red Line (60103) Complete SI-1 Fuel System Cleaner - 15 Ounce
Red Line (60103) Complete SI-1 Fuel System Cleaner - 15 Ounce

Red Line

8.7

View Product
Buy it on Amazon

16% off

8

Liqui Moly (20002) Cera Tec Friction Modifier - 300 ml
Liqui Moly (20002) Cera Tec Friction Modifier - 300 ml

Liqui Moly

8.4

View Product
Buy it on Amazon

9

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
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

STA-BIL

8.1

View Product
Buy it on Amazon

10

Lucas Oil 10279 Engine Oil Stop Leak - 1 Gallon
Lucas Oil 10279 Engine Oil Stop Leak - 1 Gallon

Lucas Oil

7.8

View Product
Buy it on Amazon

Related Reviews You Might Like

Fuel Additives

Fuel Additives

Oil Additives

Oil Additives
subscribe-icon

Best Reviews Guide Newsletter

Get exclusive articles, recommendations, shopping tips, and sales alerts

By submitting your email address you agree to our Terms and Conditions and Privacy Policy