Hey guys. Went to put long tubes on and notices my exhaust ports are white. Now normally white exhaust ports mean lean or running hot. Now my charge temps have been hitting 140 which isn't too bad . But I've been running 100 octane only for about 1000 miles at this point . Can the higher octane gas cause this? That's sort of what I was thinking because my air fuel is great and there's no spark knock or misfires and only 12 degrees timing. Been running 11.5 psi.