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DOMINATOR 20W-50 Competition Diesel Oil

Product code: DCOQT-EA

AMSOIL DOMINATOR® 20W-50 Competition Diesel Oil is designed for professionals and enthusiasts who want a step up in diesel protection. It is specifically designed for high-horsepower diesel engines and delivers the benefits most important to diesel competitors, including robust durability, outstanding bearing protection and the ability to withstand the extreme pressures and temperatures common to diesel competition.


Availability and Price subject to AMSOIL stock, visit product's page for updated information.


  • Use in performance-modified diesel engines that require any of the following specifications:

    · API CK-4, CJ-4, CI-4+, CH-4
    · Cummins 20081/20086
    · Mack EO-O/EOS-4.5
    · Volvo VDS3/VDS4/VDS4.5
    · Caterpillar ECF-2, ECF-3, ECF-1-a
    · Renault RLD-3/RLD-4
    · Chrysler MS 10902
    · Ford WSS-M2C171-F1
  • DOMINATOR 20W-50 Competition Diesel Oil is compatible with other conventional and synthetic engine oils. Mixing AMSOIL diesel oils with other oils, however, will shorten the oil’s life expectancy and reduce its performance benefits. AMSOIL does not support extended drain intervals where oils have been mixed.

    Aftermarket oil additives are not recommended for use with AMSOIL synthetic diesel oils.
  • DOMINATOR Competition Diesel Oil provides lasting protection for multiple events. Use oil analysis to determine appropriate drain interval.

    Note: When not competing, follow OEM1 drain intervals or extend drain intervals with oil analysis.

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