News
4WD Differential Oil
Your Gear Oil Doesn't Last Forever
Gear oil doesn't suddenly fail the day a differential starts making noise. Discover how heat, load, oxidation, contamination and hard use gradually affect your lubricant — and why regular different...
85W-140 Gear Oil
What Makes a Good Gear Oil?
85W-140 is only the starting point. Discover what really makes a gear oil work, from viscosity and EP chemistry to base oils, Limited Slip compatibility and severe-duty protection.
4WD Differential Oil
Differential Oil: Why It Matters More Than You Think
Your engine oil gets plenty of attention. Your differential oil? Not so much. But behind the scenes, that oil is protecting gears and bearings from heat, pressure and load every time you drive. Fro...
