Ok....10-30 for now and after break in I will use Mobil1. I looked at Roush's site and he did say use 10-30 non syntheitc for 1st 3K miles. I will use Mobil1 after that. I have read on a few sites that some people have had problems with
synthetic will roller lifters...they said instead of the roller bearing rolling over the lobe it was sliding due to very low friction. Is that just hype or has anyone had a roller lifter fail with
synthetic oil??