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Premium Conventional Heavy Duty Diesel Engine Oil

Heavy Duty Engine Oil

Our top-quality premium conventional heavy duty diesel engine oils improve performance, extend engine life and resist thermal breakdown.

Protection for Today’s Engine Designs and Fleets 

As today’s engines are evolving and heavy duty engine manufacturers are recommending thinner, lighter oils, MAG 1® has evolved right along with them. Plus, we have outstanding technology for our heavier viscosities. Only the most advanced engine oils meet the difficult challenges of effectively balancing durability, extending drain intervals and protecting emissions control devices in modern and older engines.

Unsurpassed Protection

MAG 1® with FMX® Technology provides unsurpassed protection in every viscosity. Even our lowest viscosity oils protect better than thick oils of the past. FMX Technology creates a strong, durable and high-performing level of protection that controls friction and reduces metal-to-metal contact. 

Our advanced oil technology actually improves oil properties over time, retaining viscosity, friction and anti-wear benefits, in spite of severe engine temperatures. MAG 1 can often improve fuel economy in the 10W-30 grade. 

Premium Conventional Heavy Duty Diesel Engine Oil featuring FMX® Technology and Evolutionary Performance™

MAG 1 Heavy Duty Diesel Engine Oils are specially engineered and formulated to provide:

Performance

Unsurpassed protection for extended drain intervals.

Up to 1.6% improved fuel mileage in the HD 10W-30 grade.¹ 

Strength

Up to 53% better wear protection.²  

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Durability

Up to 83% better oxidation control.² 

Up to 63% better deposit control.²

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¹ Using HD 10W-30 CK-4, compared to Conventional HD 15W-40 CK-4 during on-highway long-haul service. Savings will vary on idle time and other driving conditions of your fleet or vehicle.

² Compared to new limits of API CK-4 requirements.

Premium Conventional Heavy Duty Diesel Engine Oil

MAG 1® Premium Conventional 15W-40 CK-4 Heavy Duty Diesel Engine Oil

MAG 1® Premium Conventional 15W-40 CK-4 is technologically advanced heavy duty diesel engine oil that provides outstanding performance.

Product Details 
HDDEO Premium Conventional 15W-40 CK-4 Front
Premium Conventional Heavy Duty Diesel Engine Oil

MAG 1® Premium Conventional 10W-30 CK-4 Heavy Duty Diesel Engine Oil

MAG 1 Premium Conventional 10W-30 CK-4 is technologically advanced heavy duty diesel engine oil that provides protection and performance.

Product Details 
HDDEO Premium Conventional 10W-30 CK-4 Front
Premium Conventional Heavy Duty Diesel Engine Oil

MAG 1® Premium Conventional 15W-40 CI-4+ Heavy Duty Diesel Engine Oil

MAG 1® Premium Conventional 15W-40 CI-4+ is technologically advanced heavy duty diesel engine oil that provides outstanding performance.

Product Details 
HDDEO Premium Conventional 15W-40 Cl-4+ Front