Cummins Marine Diesel Engine

Almost a decade of protection and cleanliness

Inside an engine running on Mobil Delvac 1™ ESP 5W-40 engine oil

The best way to determine a lubricant's effectiveness is to simply look inside the engine. When a team of ExxonMobil experts conducted a full engine inspection of a Cummins KTA38 marine diesel engine that used Mobil Delvac 1™ ESP 5W-40 engine oil, the results spoke for themselves:

  • Demonstrated excellent protection and cleanliness
  • Significant lack of wear on common wear components, such as piston skirts, piston wrist pins, crankshaft and gears
  • Oil drain intervals safely extended to 3,000 hours, over 10 times longer than engine builder's recommendation, while maintaining OEM recommended filter change intervals

All of this was achieved after 21,782 running hours, with an initial fill of Mobil Delvac 1 ESP 5W-40 engine oil.

  • Marine engine close up in the dark

    Mobil Delvac 1™ ESP marine diesel engine oil

    Mobil Delvac 1 ESP fully svnthetic diesel engine oil is designed to help extend oil drain intervals and engine life, protect components and reduce waste oil.

    View lubricants
  • Breakdown of all the different parts of the engine for ExxonMobil engine teardown

    View engine cleanliness results

    Download our infographic for a quick look inside the Cummins KTA38 engine.

  • Photo of ship for ExxonMobil Engine Teardown

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