why 5W30?
Royal purple FTW.....
ive always ran full synthetic, but keep this in mind... once you put synthetic in your car, you can NEVER go back to regular oil.
thats about the biggest line of BS ive read today. as long as your gaskets and everything are in good condition, you will have absolutely NO problems switching back and forthonce you put synthetic in your car, you can NEVER go back to regular oil.