Like I have mentioned before with the changes in the oils over the last few years we have found the Jo Gibbs
oil to be the best for the engines that we build. We run either the 10W40 or the 15W50 Hot Rod oils. It depends on your location and how hot it gets where you are located. Most of the time the 15W50 will work fine and it is probably better on an all aluminum engine because they have a little more clearance when they get hot.
We have found this
oil to work very well with the extra ZDDP that it has plus there is a special additive that helps the
oil stay on the parts. This is great for cold start up and for engines that may set a while between driving. Feel free to give Tony or Lance a call and they can ship you some out.
Thanks, Keith