All The Fluids For A 2002 BLW 525i

Check your owner's manual for fluid specifications. For oil, anything that is BMW LL-01 rated is acceptable, I use Mobil 1 or Castrol Edge 0w40 (neither are LL-01 anymore, but that just because they didn't want to renew the certification because it's outdated). As for coolant, BMW blue coolant is the best, although you can use Zerex G-05 if you want to save a little money. However, I recommend BMW coolant. For the differential, I believe 75w90 is the correct weight, however you'll want to check your owner's manual.