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AMSOIL has 2 families of diesel motor oils for today's cars and trucks to choose from:

  • Signature Series Max-Duty
    Signature Series Diesel Motor Oils

    The best
    • 6 times More Wear Protection than Detroit Diesel Specification.
    • 60% Better Turbo Cleanliness
    • 76% Less Oil Consumption than Required
    Extended Service Interval
    • Heavy-Duty On-/Off-Road: Three times (3X) OEM1 recommendation, not to exceed 60,000 miles/600 hours or one year, whichever comes first.
    • Turbodiesel Pickup: Two times (2X) OEM1 recommendation, not to exceed 25,000 miles or one year, whichever comes first.
    • Can be extended longer with Used Oil Analysis

    Available: 15W-40, 5W-40, 10W-30, 0W-40, 5W-30

  • Heavy-Duty
    Heavy-Duty Diesel Motor Oils
    • 4 Times More Engine Protection
    • 66% Less Oil Consumption

    Available: 15W-40, 5W-40, 10W-30

  • For pre-2007 diesels AMSOIL also has the older spec oils
    NOTE: for almost all applications, the Signature Series and the Heavy-Duty Series are backwards compatable and the better choice.
    Pre-2007 Diesel
    Available: 15W-40, 5W-30, 10W-40, 20W-50