When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Used to run Mobil1 10w30 for three years. Switching to a 40 weight with the new 427. I have Castol GTX 10w40 in it right now for break in. Going to switch to Mobil1 soon, not sure what they have for a 40 weight except for the 0w40 Euro oil.