I was getting my mark out of hibernation this past weekend. I changed the oil, Mobil 1 of course. But I used 10W-30 instead of 5W-30. I must be green/blue colorblind because I swore I got the right grade. Anyway, it wasn't until I was cleaning up when I realized what I did. I have not driven any miles yet and probably won't for a few weeks. I checked the archives on the other board and didn't see any definitive answer. Should I switch back to 5W-30 right away or will I be ok with the 10W-30?