What Is The Difference Between 75 90 And 75W-140 Gear Oil?
What Is The Difference Between 75 90 And 75W-140 Gear Oil? A 75W-90 will be thinner at higher oil temperatures than a 75W-140. Both are the same thickness at lower oil temperatures. The 75W-140 is said to have a wider viscosity range – when more accurately it would be a wider temperature range. Is Thicker