Modern engine design and the need to reduce CO 2 emissions have led to the development of additional engine oil categories and a growing number of engine oil viscosity grades for diesel engines.

Ford has supplied an SAE viscosity grade chart for the 6.7 Power Stroke ... Ford recommends Motorcraft 10W-30 Super Duty diesel motor oil. If the ambient temperature reaches -22.0°F or below ...

This shift is accelerating as engine ... temperature conditions, other viscosity grades in SAE 5w-X and even 0w-X are being considered. In the past, there have been similar shifts in preferred ...