Heavy-Duty Motor Oil

To meet lower emissions standards and improve fuel savings new diesel engines operate significantly higher in temperature than previous requiring improvement in thermal stability of heavy-duty diesel engine oil. New oils must resist the effects of oxidation, thermal attack and viscosity breakdown better than all previous API service category performance standards. It must also provide longer service life… up to 80,000 miles between oil drains.

Heavy-Duty Motor Oil Solution



When developing PEAK’s line of Heavy-Duty Diesel Engine Oils, we leveraged our experience in Heavy-Duty Coolants and Diesel Exhaust Fluid to go beyond API CK-4 performance standards. PEAK’s Full Synthetic and Synthetic Blend Heavy-Duty Diesel Engine Oils deliver premium performance in key areas of oxidation control, protection from wear, acid neutralization, and resistance to thermal viscosity breakdown. Even during longer oil drains. PEAK Heavy-Duty Diesel Engine Oil meets API CK-4 oil service level, all previous API C service levels, and current OEM warranty oil performance requirements.

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