Due to the fact that diesel engines produce more contaminants ... For example, a common oil rating is 15W-40, with 15 representing the oil's dynamic viscosity (with the W as a reminder of the ...

Engines used in transport vehicles ... oils with better flow characteristics over those in the SAE 15W-40 grade, is the oil’s ability to reach lubrication points faster on engine startup.

76 Firebird Heavy Duty EC 15W40 engine oil from ConocoPhillips has been upgraded to meet lubrication requirements of the 2007 and later model year, low-emissions diesel engines equipped with ...

Dodge began using the 6.7L Cummins diesel engine in Ram trucks in 2007 and ... produced through the 2018 model year require 15W-40 engine oil certified to API CJ-4 standards.