Check out Schaeffer 9000??? i hear its suppose to work very well for hot and high revving engines
and
http://www.bobistheoilguy.com/forums/ubbthreads.php?ubb=showflat&Number=2246216
and
http://www.bobistheoilguy.com/forums/ubbthreads.php?ubb=showflat&Number=2246216