Mobil Delvac Modern 10W-40 Advanced Protection

Worth knowing

The ZF TE-ML 04C and 23A codes in this oil’s data sheet concern not a truck engine but ZF units: in ZF’s lists, class 04C means an engine oil for marine gearboxes and 23A an oil for stationary installations of groups 8TX10500, 8TX10501 and 8TX10502, with oil and filter changed every 1,500 hours or yearly, at outside temperatures above -10 °C. Mobil Delvac XHP ESP 10W-40, a previous name in Mobil’s list, stands next to it in those lists. Codes like these do not affect the choice of oil for the engine.

The Cummins CES 20081 and 20086 approvals have a limit too, though the data sheet also mentions naturally aspirated diesels. For engines without exhaust after-treatment running on fuel with more than 15 ppm sulphur, Cummins does not recommend such oils and names CES 20078; this advice is explained in the article on Cummins, Deutz and MTU oil requirements. Among Mobil’s 10W-40 oils, Mobil Delvac Modern 10W-40 Super Defense holds the CES 20078 approval, for example: an oil for engines without a particulate filter. The Isuzu DEO entry applies only to vehicles with a DPD filter, and for biodiesel the document refers to the equipment maker’s servicing recommendations.