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KCK infographic comparing 75W-90, 80W-90 and 85W-140 gear oils, explaining SAE J306 viscosity grades, low and high-temperature classifications, and why thicker isn't always better.
4WD Differential Oil

75W-90 vs 80W-90 vs 85W-140: What's the Difference?

Is thicker gear oil really better? Discover the differences between 75W-90, 80W-90 and 85W-140, what the viscosity numbers actually mean, and why choosing the correct gear oil matters more than sim...