Cenex^® Diesel engine oils

For over 90 years, Cenex 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.

Engine oil for diesel engines

Cenex premium, heavy-duty diesel engine oils are suitable for use in high-speed, four-stroke diesel engines and are designed to meet the most current model year on highway and Tier 4 off-road exhaust emission standards. Cenex diesel engine oils are excellent for on-highway fleets, construction, agriculture, forestry applications and diesel pickup trucks.

Find the right product for your equipment

Maxtron^® DEO Synthetic Blend Diesel Engine Oil

Synthetic blend heavy-duty diesel engine oil formulated with industry leading 5 SSI EnduroVis™ star polymer technology for exceptional oil durability and improved engine performance. Available in 15W-40 and 10W-30 viscosity grades.

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Maxtron^®Enviro-EDGE^®Full-Synthetic Diesel Engine Oil

Full-synthetic heavy duty diesel engine oil formulated with industry leading 5 SSI EnduroVis™ star polymer technology for highest level of oil durability and engine performance. Available in 5W-40 Viscosity grade.

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Superlube TMS^® Para-Synthetic Diesel Engine Oil

Features an enhanced formulation of conventional and synthetic base oils, which provides field-tested engine durability, superior protection against soot and prevention of oil thickening. A perfect choice for dirty, dusty and heavy load conditions. Available in 15W-40 and 10W-30 viscosity grades.

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Superlube 518^® Straight Grade Diesel Engine Oil

An enhanced diesel engine oil formulated for older diesel and gasolines engines calling for a low-ash straight grade oil. Available in 10W, 30W, 40W, and 50W straight grade viscosities.

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Railroad Diesel Engine Oil: GE and EMD Approved 9 TBN Railroad Oil

GE and EMD approved railroad diesel engine oil. Formulated with a zinc-free and balanced additive package to control deposits and reduce wear. Available in 20W-40 and 40W straight grade viscosities.

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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

Product overview

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Outstanding engine protection

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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.

Enhanced corrosion protection for reduced wear

Preventing corrosive bearing wear, which results from acid formation in the engine, is crucial for extended drain protection. Cenex heavy-duty diesel engine oils provide a high and durable Total Base Number (TBN), safeguarding your equipment investment.