Frank, Nick, and others: I have a 401 Spirit drag car which does see some street time, and I run 15W-50 Mobil 1. Recently I gave a ride to a friend who happens to be an experienced AMC V-8 builder, someone whose judgement I thoroughly trust. He saw my oil pressure and said to change to 10W-40 (he thought it was too high). It never goes below 40 PSI (mechanical gauge). I have the Milodon sump with external lines to the oil pump. I plan to switch to diesel 15W-40, both reducing the viscosity and getting the additives only found in diesel oil now. Comments? Cliff Danley Jacksonville, Florida _______________________________________________ Amc-list mailing list Amc-list@xxxxxxxxxxxx http://splatter.wps.com/cgi-bin/mailman/listinfo/amc-list