Bob;
I switched to Mobil 1 5/30 a while back from Rotella 15/40,actually lost 10 psi once the motor and
oil are fully warmed up,when hot (190/200) after running 10 laps of open track I come in with 20 psi of
oil pressure when I used to never have less than 30 at idle and 55 at speed.... I still think the Mobil 1 is a better
oil,just do not like losing 10 psi across the board with it....Running a 350 hp 351-W....with a stock pressure and volume Melling oil pump...
David