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a fleet of trucks moves down the highway fueled by Mobil Delvac products and solutions

There’s a lot to consider when it comes to maintaining commercial equipment. You know that taking good care of your heavy-duty vehicles can help boost uptime, get the job done right and improve the reputation of your business with customers. Protect your investment with information on new Mobil Delvac™ engine oils, improving fleet efficiency, PC-11 (CK-4, FA-4) and more.

The new gold standard in engine oil.

Get the best tech for big trucks. Discover how the new CK-4 and FA-4 Mobil Delvac™ heavy-duty diesel engine oils outperform CJ-4 oils.

Energy efficiency guide

Get tips that can help improve your fleet’s efficiency – on and off the road.

CK-4 or FA-4?

Find out which PC-11 oil is right for your trucks. See our OEM heavy-duty equipment chart for PC-11 product recommendations.

Ready for PC-11?

Learn how the American Petroleum Institute’s upcoming diesel engine oil specification change will affect you, your trucks and your business.

The development of PC-11

Get more of the story behind PC-11. Plus, learn how your fleet can make the switch to the new CK-4 and FA-4 oils.

The PC-11 Quiz

How well do you know PC-11? Test your knowledge with our five-question quiz.

PC-11 FAQs

There are a lot of questions surrounding the upcoming diesel engine oil specification change. Get more of the details behind PC-11 here.

5 reasons to use low viscosity oil

Learn why more and more people in the trucking industry are making the switch to low viscosity engine oil.

Why synthetics?

Should you choose synthetic or conventional engine oil? Find out about the benefits of synthetic engine oil.
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