Truck and Bus Engine Oils

As automatic transmissions become more complex there’s a need for more technologically advanced fluids to ensure vehicle reliability. Getting the right oil for your car is key to ensuring your transmission operates as designed and you get a smooth driving experience every day.
 
Castrol, with over 100 years of experience in developing transmission fluids, and being the choice of many leading car and transmissions manufacturers for factory-fill products, offers a range of automatic transmission fluids for your car’s requirements. Providing you the peace of mind that you are selecting the right oil for your vehicle. 

Castrol® Duratec™ ES 15W-40

Castrol® Duratec™ ES 15W-40 Synthetic Natural-gas Engine Oil
The on-road synthetic natural-gas engine oil that enables “extreme” extended-drain intervals up to 1,200 hours.

Castrol® Duratec™ M

Castrol® Duratec™ M for High-Speed 4-Stroke Natural-gas Engines.
Proven protection for high-speed 4-stroke natural-gas engines.

Castrol® Duratec™ NG 15W-40

Castrol® Duratec™ NG 15W-40 Natural-gas Engine Oil
The on-road natural-gas engine oil that extends drain intervals up to 600 hours.

Castrol® Elixion™ 5W-30

Castrol® Elixion™ 5W-30
This unique synthetic oil is specially formulated for maximum fuel efficiency in on-road applications.

Castrol® Tection® Extra 15W-40

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Modern engines run under harsher conditions than ever before. That's why Castrol Tection Extra is engineered to deliver 12 benefits in 1.

Castrol® Assuron™ 10 30 & 10 40

Castrol® Assuron™ 10 30 & 10 40
High-performance, straight-grade, heavy-duty engine oils that are extremely resistant to high temperature deposits.

Castrol® Hypuron™ Advanced Formula 10W-30

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This advanced formula can extend your drain intervals all the way to 70,000 miles*.

Castrol® Hypuron™ 15W-40

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The market-leading extended-drain oil, safely allowing fleets to run up to 50,000-mile drain intervals.