Demands on heavy-duty diesel engine ... have successfully used 10W-30 and witnessed lower wear metals via used oil analysis — showing that lighter viscosity heavy-duty engine oil can still ...

New EPA 2027 emissions rules also mean new diesel engine oil specs. A new generation of heavy-duty engine oils will feature lower viscosity, improved thermal resistance, and possibly longer oil drain ...

Engines used in transport vehicles, whether fueled by gasoline, diesel, or natural gas ... coupled with select lubricant stocks that make up the engine oil. Approaches to this mix continue ...