Most internal combustion engines rely on motor oil for one reason: lubrication. The oil gets pressurized between 10-70 psi and spends most of its life subjected to roughly 200 degrees’ worth of heat.

Engine oil and coolant are the interrelated lifeblood of the 6.0L Power Stroke, and if a clot should form or the fluids become mixed, serious internal trauma is likely. Like most diesel engines, the 6 ...

Generating 445 hp and 910 lb.-ft. of torque, the new 6.6L Duramax shares only bore and stroke with current models; new GM-developed controls help generate 90% of peak torque from 1,550 to 2,850 rpm ...

General Motors has been using Duramax diesel engines in certain workhorse models for nearly a quarter century. The 6.6-liter V8 version which powers Chevy Silverado 2500/3500HD and GMC Sierra Heavy ...