Cenex^® Diesel engine oil

For over 90 years, Cenex(R) has been keeping diesel engines running smoothly and efficiently with heavy-duty diesel oil, engineered to exceed the highest industry and manufacturers’ requirements for new, current and older diesel engines. No matter what conditions you face, from long hours of operation under heavy loads to dusty, dirty and cold weather conditions, Cenex has the heavy-duty engine oil to meet your needs.

Product benefits

The Cenex portfolio of heavy-duty diesel engine oils meets the requirements of the API CK-4 service category and the more demanding needs of the most current OEM requirements.

Radial polymer technology

Engineered to retain its form, this technology provides exceptional shear stability and minimizes viscosity breakdown under engine stress and heavy loads
Exceptional soot control

With proven soot control that exceeds the requirements of new and older engines to extend engine life
Cold weather performance

Excellent cold-flow properties and low-temperature pumpability
Exceptional engine cleanliness

Proven to provide superior piston cleanliness at 500,000 miles
Excellent TBN control and retention

To neutralize more combustion contaminants (deposits, soot, acids) during the course of a drain interval
Balanced additive package

Increasing engine efficiency by protecting against deposit buildup and sludge caused by thermal oxidation
Exceptional shear stability

Cenex Maxtron diesel engine oils retain 80% of their original viscosity between drain interval

Our motor oil for gasoline engines

Drivers across the nation trust Cenex® premium oils for gasoline engines to keep their cars and light trucks safe, maintenance-free and on the road. Our passenger car motor oils are tested and proven to provide superior engine protection, cleaner emissions and enhanced fuel economy in tough conditions.

Product overview

The Cenex manufacturing difference

Our products are blended and shipped from one of our three blending locations located in Texas, Minnesota and Ohio. All three plants are ISO 9001-2015 certified, and our oil lubricant products are triple tested to ensure quality and consistency before ever leaving the plants. Unique filtering systems help us achieve some of the lowest ISO cleanliness numbers and our advanced robotics create efficiency in packaging.

Exceptional engine cleanliness

Cenex advanced formulas are engineered with Wear Saver Technology® to provide an additional level of protection for engine parts under the most extreme conditions. These oils disperse conventional and EGR soot into finer particles that are far less abrasive on engine parts. All formulations are proven to provide superior piston cleanliness at 500,000 miles.

Outstanding engine protection

Conventional oils tend to oxidize at high temperatures, leading to the buildup of sludge and varnish. For extended drain intervals, oxidation resistance is crucial. Cenex oils meet this demand, exceeding the most grueling oxidation test required by Mack for API CK-4, delivering virtually no viscosity change in the Mack T-13 test. Engineered to provide superior viscosity retention and shear resistance, Cenex diesel engine oils outperform conventional oils. Our high-performing diesel engine oils feature industry-leading polymer technologies to extend oil durability for longer oil life and engine protection.