I Believe that the Manual Suggest for either 10W-40 or 20W-50. I usually do a lot of spirited driving and I use Mobil 1, bull synthetic 15w-40 Racing Oil.
You can get it at Walmart for a decent price. If you have not used synthetic before get some High-Mileage 15-40 or 20-50 for yourself.
Group 92
best oil is 5w30
The engine oil capacity is 6.5 L (6.9 US Quarts).
75w90 gear oil, synthetic or non synthetic
Mobil one 10w-30
Yes? 75w-90 is factory recommended, if that's what you're asking.
NO!
Equivalent material e36
BMW E36 service manual requires 6.9 qt of synthetic oil
5 w 30 is recommended but I use 10 W 30 for extra lubrication its better for the motor
yes whit no problemos
you could be: low on oil, using the wrong viscosity of oil, have an oil pump problem