So my question is, before I had the engine rebuilt i used the Lucas and really felt the difference. This is a testament to what many of you guys are saying judging by what was found when I opened it up for rebuild! Now that it is rebuilt nice and tight, I haven't used it in the break in or first regular oil change. I use 10w30 castrol conventional and Lucas zinc additive. This was directed by the speed shop that did the rebuild and warranty. So how come 4 pages of this thread and no one has mentioned the zinc necessity? The shop acted like this was common knowledge for these engines and I had never come across it. Was this just something I should have known? All the kids are doing it except me?
Earning an engineering degree one CJ7 hiccup at a time