In case you do not know about this website, look around on Bob Is The Oil Guy and you can read 1000X more info than you ever wanted to know!
http://www.bobistheoilguy.com/forums...s.php?ubb=cfrm
Here's just one thing I quickly found on there about the Joe Gibbs Oil:
Q: Has anyone been using this oil in thier race cars? Thier website says to change the filter every 100 laps or so instead of a complete oil change. I like the idea since this oil is very expensive.
A:Joe has a REALLY low TBN; it would be a better idea to swap the oil and keep the filter after 100 laps.
A: Yes it does, I had a VOA done on XP3 and the TBN was 2.6.