I *THINK* Lucas, like Redline oil, doesn't use detergent packages and a few other things in their race oils. I never liked that but the theory is with short drain intervals you don't need them.
You still have cold starts on a race car and other things that detergents and dispersants help with.
If Lucas says not to use a racing oil on the street I'd listen. I've met both Forrest and Charlotte when Morgan was in the A/FD. They are very nice people.
