I have a 2020 BMW X5 sDrive40i (G05) rear wheel drive, and I’m planning to change the rear differential fluid. I’m considering three options:
BMW G3 Hypoid Differential Fluid (500mL)
BMW GL-5 70W-80 Differential Fluid – Febi 184247 (1L)
Red Line 75W-85 GL-5 Gear Oil (1 Quart, PN 50104)
I have a few questions:
Are all three suitable for my vehicle’s rear differential?
Are there any cold-weather performance differences or limitations I should be aware of for each fluid?
Is there any risk of using the Red Line fluid instead of the BMW fluids regarding performance or compatibility with my rear differential?
Thank you for your guidance. I want to ensure I choose the best option for my car.