[buzzinhalfdozen]

At least on a 9 inch it's very easy to keep the oil in the gear area. Fitting and welding small "dams" in either side of the housing works good. For the most part 2 quarts in a 9inch is what I run, have tried the 1 quart deal but honestly saw no measurable difference. I'll put this one in the running 2-3 quarts of engine oil column, use at your own risk. Your results may vary I would think that if there were a gain to be had at least in drag racing....heating the oil would be of greatest benefit.