When did you start putting in synthetic oil? (Castrol Edge Titanium)

olddudesrule

I wouldn't have an issue switching at 3k miles. That's a decent break-in for a modern engine. As far as the oil goes, I don't have anything good or bad to say about Castrol. It was my go-to oil (in Dino form) in the 80's, but I haven't used it since then. I've used M1 in various weights in the last 10 years, and am currently using M1 0W-40. Used it in three other high performance vehicles, and like the results (and Blackstone reports).