Thanks, everyone. I'm gonna go with synthetic 5W-20 tomorrow morning (while it's still below 100 outside).

Thanks, Star. I was admiring your bike travel pics just yesterday.

I have a 2010 Vibe, 1.8L. I have scanned the postings and haven't seen this subject. The oil cap says 5W-20 or 0W-20, but the manual says to use only 5W-30. I verified with local GM parts man that I have the original and correct oil cap. He guessed that its just a difference of opinion between Toyot...