Originally Posted By: dparm
Originally Posted By: yannis
viscosity is irrelevant , you have to search for the appropriate specifications.
Viscosity is not irrelevant. You need to select the appropriate viscosity AND the appropriate specifications.
+1
And the appropriate viscosity is usually the lightest oil recommended by the manufacturer. In this case that would be the BMW 5w30 but that isn't the cheapest oil. That would likely be Mobil 1 0W-40.
