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10 Best engine oil fluid additives of 2026

Save up to 49% off
  • Best Choice

    1

    LiquiMoly 3721 Engine Oil Additive
    Liqui Moly
    9.8
    Exceptional

    LiquiMoly 3721 Engine Oil Additive

    • is discontinued by manufacturer: No
    • manufacturer part number: 3721
    • item weight: 12 ounces
    • customer reviews:4.7 4.7 out of 5 stars 1,169 ratings 4.7 out of 5 stars
    • asin:B01KGHA43Y
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  • Value for Money

    2

    REV-X Zinc ZDDP Oil Additive - 2 fl. oz. (5 Pack)
    REV X
    9.6
    Exceptional

    REV-X Zinc ZDDP Oil Additive - 2 fl. oz. (5 Pack)

    • is discontinued by manufacturer: No
    • manufacturer part number: ZINC0201
    • item weight: 12 ounces
    • customer reviews:4.8 4.8 out of 5 stars 384 ratings 4.8 out of 5 stars
    • asin:B07GX3S27B

  • 3

    Liqui Moly MoS2 Anti-Friction Engine Treatment | 300 ml | Oil additive | SKU: 2009
    Liqui Moly
    9.5
    Excellent

    Liqui Moly MoS2 Anti-Friction Engine Treatment | 300 ml | Oil additive | SKU: 2009

    44% Off
    • is discontinued by manufacturer: No
    • manufacturer part number: 2009
    • item weight: 6.4 ounces
    • customer reviews:4.7 out of 5 stars 4,547 4.7 out of 5 stars
    • asin:B003U4O414

  • 4

    Lucas Oil 10001 Heavy Duty Oil Stabilizer - 1 Quart
    Lucas Oil
    9.3
    Excellent

    Lucas Oil 10001 Heavy Duty Oil Stabilizer - 1 Quart

    • is discontinued by manufacturer: No
    • manufacturer part number: 10001
    • item weight: 2.03 pounds
    • customer reviews:4.8 4.8 out of 5 stars 5,351 ratings 4.8 out of 5 stars
    • asin:B000AS1XYO

  • 5

    Prolube Oil Treatment - Engine Oil Additive for Gas & Diesel Engines - Reduces Wear, Noise, Vibration - Boosts Fuel Economy & Horsepower - Works on Transmissions & Differentials (1QT)
    Prolube
    9.2
    Excellent

    Prolube Oil Treatment - Engine Oil Additive for Gas & Diesel Engines - Reduces Wear, Noise, Vibration - Boosts Fuel Economy & Horsepower - Works on Transmissions & Differentials (1QT)

  • See Today’s Deals & Prices

  • 6

    Liqui Moly Engine Treatment, 300 ml | MoS2 Anti-Friction | Oil Additive | Pack of 2
    Liqui Moly
    9.0
    Excellent

    Liqui Moly Engine Treatment, 300 ml | MoS2 Anti-Friction | Oil Additive | Pack of 2

    49% Off
    • is discontinued by manufacturer: No
    • manufacturer part number: 2009
    • item weight: 12.8 ounces
    • customer reviews:4.7 4.7 out of 5 stars 4,649 ratings 4.7 out of 5 stars
    • asin:B0CXQ172L6

  • 7

    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
    Liqui Moly
    8.9
    Very Good

    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

    • is discontinued by manufacturer: No
    • manufacturer part number: P000017
    • item weight: 10.6 ounces
    • customer reviews:4.7 out of 5 stars 21,078 4.7 out of 5 stars
    • asin:B001CZODH8

  • 8

    Engine Oil Additive & Treatment – Diamond Nano-Lube by BestLine Racing – Reduces Friction Up to 60% – For Gas & Diesel Engines – Motor Oil Additive for More Power, Engine Life & Fuel Economy
    DNL
    8.8
    Very Good

    Engine Oil Additive & Treatment – Diamond Nano-Lube by BestLine Racing – Reduces Friction Up to 60% – For Gas & Diesel Engines – Motor Oil Additive for More Power, Engine Life & Fuel Economy

    • is discontinued by manufacturer:N/A
    • manufacturer part number: BLR-ETA-12SW
    • item weight: 13.4 ounces
    • customer reviews:4.6 4.6 out of 5 stars 815 ratings 4.6 out of 5 stars
    • asin:B084P7LTGY

  • 9

    Prolube Oil Treatment - Engine Oil Additive for Gas & Diesel Engines - Reduces Wear, Noise, Vibration - Boosts Fuel Economy & Horsepower - Works on Transmissions & Differentials (16oz)
    Prolube
    8.7
    Very Good

    Prolube Oil Treatment - Engine Oil Additive for Gas & Diesel Engines - Reduces Wear, Noise, Vibration - Boosts Fuel Economy & Horsepower - Works on Transmissions & Differentials (16oz)

    • is discontinued by manufacturer:N/A
    • manufacturer part number:‎PLO-TRT-16OZ
    • item weight:‎1.1 pounds
    • customer reviews:4.6 4.6 out of 5 stars 524 ratings 4.6 out of 5 stars
    • asin:B0DVT5763K

  • 10

    XADO ATOMEX Oil Additive Stop Leak Engine - Restore Seal and Gaskets, Treatment for Car Engine High Mileage or Rear Main Seal, Best Stopper Leaks Reseal (Bottle, 250 ml)
    XADO
    8.4
    Good

    XADO ATOMEX Oil Additive Stop Leak Engine - Restore Seal and Gaskets, Treatment for Car Engine High Mileage or Rear Main Seal, Best Stopper Leaks Reseal (Bottle, 250 ml)

    • is discontinued by manufacturer: No
    • manufacturer part number: XA 44813
    • item weight: 10.6 ounces
    • customer reviews:4.1 4.1 out of 5 stars 246 ratings 4.1 out of 5 stars
    • asin:B00KFKOR0Y

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