If you want engine longevity, even though its not a BMW recommendation (but BMW doesn’t say its deleterious either), switch to a 5W-50 or 15W-50 synthetic engine oil as the higher viscosity (thickness) oil will keep the moving parts separated, albeit with the consumption of a smidgen more fuel.
Just curious to see what your take is on this statement. I believe the person that posted this was a a oil engineer. FWIW, I've used RL 5W30 and currently GC in my BMW X5 V8 engine. The crankcase hold a whopping 8.5 quarts. Am I better off running something thicker during the summer to keep wear at a minimal ?
Just curious to see what your take is on this statement. I believe the person that posted this was a a oil engineer. FWIW, I've used RL 5W30 and currently GC in my BMW X5 V8 engine. The crankcase hold a whopping 8.5 quarts. Am I better off running something thicker during the summer to keep wear at a minimal ?