Diesel Engine Oils

Unlock the full potential with Harvest King Diesel Engine Oils

Harvest King — High Quality Products

Harvest King® Heavy-Duty Diesel Engine Oils are formulated to deliver reliable performance and protection across a wide range of applications. Our 15W-40 and 10W-30 multi-grade oils meet API CK-4, CJ-4 Plus, CI-4, and CH-4/SN classifications and are approved by major OEMs including Mack, Cummins, Detroit Diesel, Volvo, and Caterpillar. For legacy and specialized equipment, we offer SAE 30 and SAE 40 monograde oils that meet API CF-2 and are suitable for both turbocharged and naturally aspirated engines. For extreme conditions and advanced engine performance, our Full Synthetic 5W-40 diesel oil is licensed under API CK-4 and meets CJ-4, CJ-4 Plus, CI-4, and CH-4/SN requirements, with approvals from Mack, Renault, Cummins, Ford, and Detroit Diesel.

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Harvest King Diesel Engine Oils

  • Heavy Duty SAE All Fleet 15W-40 — 5 GA

  • Heavy Duty SAE All Fleet 15W-40 — 2 GA

  • Heavy Duty SAE All Fleet 15W-40 — 55 GA

  • Heavy Duty SAE All Fleet 15W-40 — 1 GA

  • Heavy Duty SAE All Fleet 10W-30 — 55 GA

  • Heavy Duty SAE All Fleet 10W-30 — 5 GA

  • Heavy Duty SAE All Fleet 10W-30 — 1 GA

  • XHD SAE All Season 10W-30 — 2 GA

  • XHD SAE All Season 10W-40 — 2 GA

  • Heavy Duty All Fleet SAE 30 — 5 GA

  • Heavy Duty All Fleet SAE 30 — 2 GA

  • Synthetic Blend 15W-40 — 2 GA

  • Heavy Duty Full Synthetic All Fleet 5W-40 — 2 GA

  • Heavy Duty Full Synthetic All Fleet 5W-40 — 1 GA

  • Heavy Duty Full Synthetic All Fleet 5W-40 — 5 GA

  • Heavy Duty Full Synthetic All Fleet 5W-40 — 55 GA

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