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10 bestEngine Additiveof December 2024

112M consumers helped this year.

1

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

Liqui Moly

9.9

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2

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

Red Line

9.8

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3

Liqui Moly 2037 Pro-Line Engine Flush - 500 Milliliters
Liqui Moly 2037 Pro-Line Engine Flush - 500 Milliliters

Liqui Moly

9.6

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4

Archoil AR9100 Oil Additive (16oz) for All Vehicles - Powerstroke Cold Starts, Eliminates Injector Problems…
Archoil AR9100 Oil Additive (16oz) for All Vehicles - Powerstroke Cold Starts, Eliminates Injector Problems…

Archoil

9.4

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5

Archoil AR6500 Diesel Treatment (40.6 oz) - Treats 400 Gallons - Additive for All Diesel Vehicles
Archoil AR6500 Diesel Treatment (40.6 oz) - Treats 400 Gallons - Additive for All Diesel Vehicles

Archoil

9.2

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Gumout 30001 All-in-One Fuel System Cleaner 296ml

Gumout 30001 All-in-One Fuel System Cleaner 296ml

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Liqui Moly Ceratec Oil Additive Treatment Ceramic Wear Protection 300ml

Liqui Moly Ceratec Oil Additive Treatment Ceramic Wear Protection 300ml

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STP 17174 Multipurpose Motor Treatment, 473ml

STP 17174 Multipurpose Motor Treatment, 473ml

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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)

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6

Liqui Moly 2009 Anti-Friction Oil Treatment - 300 ml
Liqui Moly 2009 Anti-Friction Oil Treatment - 300 ml

Liqui Moly

8.9

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7

Liqui Moly Jectron 7711 Gasoline Fuel Injection Cleaner additive, Cleans Valves & Injectors Without Removal. Updated to replace Liqui Moly 2007-300ML
Liqui Moly Jectron 7711 Gasoline Fuel Injection Cleaner additive, Cleans Valves & Injectors Without Removal. Updated to replace Liqui Moly 2007-300ML

Liqui Moly

8.7

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8

Liqui Moly 20004 Hydraulic Lifter Addtive (2 Pack)
Liqui Moly 20004 Hydraulic Lifter Addtive (2 Pack)

Liqui Moly

8.4

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9

Lucas Oil H/D Oil Stabilizer/12x1/Quart, Multi, One Size (10001)
Lucas Oil H/D Oil Stabilizer/12x1/Quart, Multi, One Size (10001)

Lucas Oil

8.1

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10

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

Liqui Moly

7.9

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