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Made tough. Just like your truck.

Heavy-Duty Synthetic Blend Motor Oil 10W-30

Substantial fuel savings benefit made with same severe duty engine protection chemistry as PEAK’s Synthetic Blend 15W-40. OEM approved performance includes Ford WSS M2C171-F1

Heavy-Duty Full Synthetic Motor Oil 5W-40

Fully synthetic formulation to extend engine life in severe diesel engine applications, provide long drain capability and fuel economy. Meets or exceeds demanding OEM truck specifications for single oil consolidation in mixed fleet operations.

Heavy-Duty Synthetic Blend Motor Oil 15W-40

Formulated for severe duty diesel engine protection in class 4 - 8 trucks including diesel engines using SCR, DPF and EGR emission control systems. OEM approved performance includes Ford WSS M2C171-F1

Diesel Motor Oils

FIND THE RIGHT DIESEL MOTOR OIL GRADE FOR YOUR VEHICLE: