Talking about synthetics vs regular
oil is like the Ford / Chevy thing. I've used synthetics in my in my F350 for years, and later I'll put it my Cobra. Here's the deal on what I have learned over the years:
1) You don't need "racing"
oil if it's not a full time race car.
2) NEVER put
synthetic in an engine with less than 1000 miles on it, you WILL ruin your engine. (rings won't seat correctly)
3) Synthetics will sometimes leak in an older engine or an engine that's not too well sealed in the first place.
4) You'll find that a lot of "older" mechanics and engine builders will tell you not to use synthetics only because it's a new school thing, and most of these guys are old school when it comes to lubricants.
5) Synthetics will hold up longer than petrolium.
6) I know of builders that have torn down BBF's after 100,000 miles using regular
oil, and the cylinders were still within spec.
It's all just whatever you want.......
Tim