Over the winter I had a 455 engine completely overhauled and put in my 68 Firebird Convertible. It was already bored 40over and had some scaring so I went ahead and did 60. Also crank was already 30/30 so I decided to replace it all with a stroker kit from Butler. Went with a XE268 Cam and 96 heads street ported with headers. So this is my baby. I just got it back a week ago and am still breaking in the engine. I will NOT be racing this engine but just want to have a lot of fun with the car (shows, drive in, goofing off in town). So my question is this. What oil do I put in it. It has standard 10W40 in it now for break in but I will change it in 2 weeks. I want my grandkids to have to worry about what to do with the rebuild. Standard oil and change often? Synthetic - If so what brand and why? What is Royal Purple - good oil or marketing hype? Is synthetic really better or just hype? I just thought this would be a good place to ask.
