My personal ordered preferences in the Mobil1 lineup are:Originally posted by stickman
... [EDIT] ... Should I worry... [EDIT] ... that im using 5w-30 instead of 10w-30.
from first to last, for the reasons stated above.
To show you just how meaningless all the stuff I spew out really is, here's an example of what happens when you take a Chevy LS1 V8 Camaro, put Mobil1 5W-30 in it, and drive 16,000 miles (no typo; sixteen thousand miles or 25,744 km).
It'll answer your question of whether to worry or not in a much more definitive manner - plus, you'll get to see what happens over 16,000 miles with data points for every 1,000 miles. A must see site. (Hint: Don't worry).