Collection: Heavy Duty Diesel Engine Oil

DOXA Fully Synthetic & Heavy Duty Diesel Engine Oil is designed and formulated to provide improve performance compare to conventional products.


Our Fully Synthetic 5W40, 15W-40 and 10W-30 is a high performance diesel engine oil designed to meet the most severe performance requirements of the latest high output, low emission European and American diesel engines. It is formulated with premium quality base oil and superior additive technology to provide the highest diesel engine performance levels.


All our heavy duty engine oil meets and exceeds CK-4, CJ-4, CI-4 PLUS and all prior categories.

3 products
  • Fully Synthetic Diesel Engine Oil SAE 15W40 CK4-5 gallon pack
    Regular price
    $91.99
    Sale price
    $91.99
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  • Fully Synthetic Diesel Engine Oil SAE 10W30 CK 4-5 gallon pack
    Regular price
    $94.99
    Sale price
    $94.99
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    per 
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  • Fully Synthetic Diesel Engine Oil SAE 5W40 CK4-5 gallon pack
    Regular price
    $90.99
    Sale price
    $90.99
    Regular price
    Unit price
    per 
    Sold out
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