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Explain the Differences Between the Diesel Motor Oils
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Explain the Differences Between the Diesel Motor Oils
I noticed on your web site that the Mobil 1 Turbo Diesel Truck 5W-40 is rated CJ-4. I currently use Mobil Delvac 1 ESP 5W-40, which is also rated CJ-4 in my 2008 Chevrolet 2500HD Duramax Diesel. Are these two similar? What's the difference?
-- Alikhan Salman, Sherwood, AR
Both products have different formulations and both exceed API CJ-4 requirements. Either product, however, can be used in your particular engine. Mobil 1 Turbo Diesel Truck 5W-40 is specifically formulated to provide outstanding protection to light-duty diesel-powered passenger vehicles. It also exceeds the requirements of API SM classification for gasoline engines. Mobil Delvac 1 ESP 5W-40 has been especially formulated for use in all super high performance diesel applications, and has engine builder approvals for the following:

• Cummins CES 20081
• Detroit Diesel Power Guard Oil Specification 93K218, 93K214
• Mack EO-O Premium Plus, EO-N Premium Plus 03
• Mercedes Benz 228.31, 228.3
• Volvo VDS-4, VDS-3, VDS-2
• Deutz DQC III-05
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