Red Line 75W90 NS GL 5 Non Slip Diff Gear Oil. Diff Gear Oil. 1 US Quart (946ml). Red Line 75W90 NS GL-5 High Performance Gear Oil. FERRARI 75W90. PORSCHE SHC 75W90. Red LineRed Line 75W90NS GL-5 is available in 1 US Quart bottles which is 946ml.