Maintenance & Care
I have some leftover oil (5W-30, 0W-30 altogether about 4qt)
from previous oil changes.
I just bought some Mobil 1 0W-20 because of a special deal at
Advance Autoparts.
Can I simply mix the 5W-30 and 0W-30 and top off with the 0W-20
if necessary?
They are all Mobil 1 full synthetic.
The...