normally u switch when winter hits to help prevent sludge, but normally u down grade other wise u go heavier in the summer\ spring
No, 5w30 is a higher grade so itshould be Ok.
5w-30 or 5w-20
5w/30 grade oil
5W-30.
5w 30
5w/30 from manufacturer
5w 30
The recommended is 5W-30.
5W-30 is the PREFERRED oil
5w-30 grade sm or sl.
Bmw 320d e46 recommended oil grade is 5w 30
depends on your climate, but a good synthetic 5w-30 will be sweet. As long as its API SG or higher