SKU: EROXD15W-40G
MPN: EROXD15W-40
EXTREME RACING OIL 15W40 CK4 Heavy Duty motor oil in a convenient 1-gallon jug is engineered for diesel engines that demand robust protection and extended drain intervals. This conventional heavy-duty diesel oil meets API CK4 specifications, making it suitable for modern off-highway and on-highway diesel equipment operating under demanding conditions. The 15W40 viscosity grade provides reliable cold-start performance while maintaining film strength at elevated operating temperatures.
The CK4 specification represents current industry standards for heavy-duty diesel engine protection, incorporating advanced additive chemistry to combat soot buildup, oxidation, and wear. A 15W40 motor oil flows efficiently at low temperatures—critical for quick engine starts in cold environments—while delivering viscosity stability across the full operating temperature range. At 7.45 pounds per gallon, this single-gallon container provides convenient portion control for routine maintenance or equipment top-ups without excess inventory.
Heavy-duty diesel operators, fleet maintenance personnel, and equipment owners rely on CK4-rated oils for engines in agricultural, construction, and marine applications. Whether maintaining older turbocharged diesel engines or newer models with tighter tolerances, this 15W40 conventional diesel oil provides the protection standard for off-road and long-haul service. The 1-gallon format suits both professional maintenance shops managing multiple vehicles and individual operators performing routine oil changes.
CK4 diesel engine oil has superseded older CI-4 and CH-4 formulations, offering improved protection against aeration, foaming, and thermal degradation. Conventional mineral-based formulations like this one cost less than synthetic alternatives while delivering reliable performance within normal drain intervals specified by equipment manufacturers. The 15W40 viscosity remains the industry standard for most heavy-duty diesel applications operating across diverse climates and load conditions.
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