Diesel & Commercial Motor Oil

Premium Blue is the only heavy-duty engine oil exclusively endorsed and recommended by Cummins. Our One Solution Technology offers true multi-fuel capability---protecting diesel, gasoline, and natural gas engines with a single formulation, simplifying fleet inventory management. Premium Blue provides a proven 5,000-mile drain extension in Cummins X15/X12 engines when fuel economy averages 7mpg or higher, reducing service frequency and operational costs. All Premium Blue products meet or exceed Cummins CES 20086 baseline specifications, with our full synthetic formulations providing enhanced protection for the most demanding applications. This combination of Cummins endorsement, multi-fuel versatility, advanced specifications, and extended drain capability sets Premium Blue apart from other diesel oils.

Absolutely. Our diesel engine oils are engineered for modern low-emission diesel engines with Diesel Particulate Filters (DPF), Exhaust Gas Recirculation (EGR), and Selective Catalytic Reduction (SCR). All formulations meet API CK-4 specifications, which provide enhanced protection for emission control systems. The advanced additive technology controls soot, reduces ash formation that can clog DPFs, and maintains performance with higher operating temperatures generated by EGR systems. This ensures both engine longevity and emissions compliance across all current diesel platforms.

Yes, our diesel oils protect pickup diesel engines extremely well. They're approved for use in Ford Super Duty, Ram Cummins, and Chevrolet Silverado/GMC Sierra diesel pickups. Premium Blue Extreme Full Synthetic SAE 5W-40 is popular for some modern pickup diesel engines requiring superior temperature performance. Always verify your owner's manual for correct viscosity specifications based on your climate and operating conditions.

Follow your engine manufacturer's recommended service intervals. Premium Blue One Solution Gen 2 offers unique extended drain capabilities: in Cummins X15/X12 engines averaging 7mpg or higher fuel economy, extend drains by an additional 5,000 miles beyond standard intervals. For severe service---frequent idling, dusty environments, extreme temperatures, or heavy towing---monitor oil condition closely and consider an oil analysis program. Always check oil level regularly between services.

Full synthetic diesel oils use 100% synthetic base oils, providing enhanced viscosity and oxidation stability, superior temperature performance, and longest service life. They excel in extreme duty cycles and contaminated environments while meeting the most demanding Cummins specifications. Synthetic blends combine conventional and synthetic base oils, offering improved protection over conventional oils at lower cost than full synthetic. Our Heavy Duty Synthetic Blend delivers 35% better wear protection versus industry standards. Blends work well for moderate duty cycles and budget-conscious operations. For maximum protection, longest intervals, and severe-duty compliance, choose full synthetic. For cost-effective enhanced protection, synthetic blend delivers excellent value.

Yes. Premium Blue Extreme Full Synthetic demonstrates up to 1.5% improved fuel economy versus conventional 15W-40 diesel oils in on-highway operations. While 1.5% may seem modest, it translates to significant fleet savings---potentially 1,500 gallons saved annually per truck operating 100,000 miles yearly at 6mpg. Premium Blue One Solution SAE 10W-30 may provide additional benefits in suitable applications where lower viscosity is specified.

Yes. Drain your current oil completely during normal service, replace the oil filter, and fill with the appropriate grade. No flushing is typically necessary when switching between quality diesel oils meeting API CK-4 specifications. Valvoline diesel oils are fully compatible with residual conventional or synthetic oils. Many fleet operators report improved performance after switching, including quieter operation, cleaner engines, and confidence from Cummins' exclusive endorsement.

Valvoline diesel oils are available at shop.valvolineglobal.com with free shipping on orders over $35. Major automotive retailers including Walmart, AutoZone, Advance Auto Parts, O'Reilly Auto Parts, and NAPA Auto Parts carry our lineup nationwide. Many truck stops, farm supply stores like Tractor Supply Co., and independent suppliers stock Valvoline diesel oils. For bulk purchases or fleet applications, contact authorized Valvoline commercial distributors who can arrange delivery in drums, totes, or bulk quantities.