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Engine Additives

10 Best Engine Additives 2025 in the United States

From leading brands and best sellers available on the web.
#1

Winner

Sea Foam S

Sea Foam

Sea Foam SF128 Motor Treatment, 1 Gallon

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#2
SeaFoam SF

Sea Foam

SeaFoam SF-16 Motor Treatment 16 oz. Can (3)

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#3
Lucas Oil

LUCAS

Lucas Oil 10002 Heavy Duty Oil Stabilizer - 1 Gallon (Pack of 4)

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#4
Lucas Oil

Lucas Oil

Lucas Oil LUC10020 Fuel Treatment - 5.25 Oz, multi-colored

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#5
Sea Foam T

Sea Foam

Sea Foam Truck & SUV Motor Treatment ST20, 20 oz

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Related Products

#6
Chevron Te

Chevron

Chevron Techron Concentrate Plus Fuel System Cleaner, 20 oz., Pack of 1

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#7
Red Line 6

Red Line

Red Line 60103 SI-1 Complete Fuel System Cleaner - 15 Ounce (2 Pack)

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#8
LIQUI MOLY

Liqui Moly

LIQUI MOLY Oil Additive Cera Tec 20002 Ceramic Wear & Tear Protection for Petrol & Diesel Engines Smoother Engine Performance, Less Friction & Lower Fuel Consumption 300 ml

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#9
Heet Iso-H

Heet

Heet Iso-HEET Water Remover And Premium Fuel Line Antifreeze + Injector Cleaner Helps Increase Gas Mileage Improves Engine Performance Year Round Performance, 12 fl. oz. (28202) , Red

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#10
STA-BIL Fa

STA-BIL

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

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