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10 bestEngine Additivesof September 2025

112M consumers helped this year.

1

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

Lucas Oil

9.8

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2

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

Liqui Moly

9.6

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5% off

3

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

Liqui Moly

9.4

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5% off

4

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

Liqui Moly

9.2

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5

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

Liqui Moly

9.0

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Related productsUp to 9% off

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

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

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Lucas Oil 10016 Complete Engine Treatment - 16 fl oz

Lucas Oil 10016 Complete Engine Treatment - 16 fl oz

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Marvel Mystery Oil 32oz. (Pack 2)

Marvel Mystery Oil 32oz. (Pack 2)

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

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

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12% off

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

8.8

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9% off

7

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

Lucas Oil

8.6

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20% off

8

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

8.3

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9

STP 17174 Multipurpose Motor Treatment, 473ml
STP 17174 Multipurpose Motor Treatment, 473ml

STP

8.0

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10

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

Lucas Oil

7.7

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