around when it's time to change my oil again(3500 on the new motor) i'm thinking about going with amsoil 10w40 or 15w40. i'm running delo 400 15w40 and it's great stuff. no leaks, except from the damned half moon gasket 
dont use this in a gas motor the only gas truck we had at work we used this stuff in it because we use it in the power strokes and the motor blew up the rings siezed to the piston and the mechanc who put the new motor in said it was because of the oil it is for diesels only it has differend aditives for the diesels and has lower api standards
Logged
89 ext cab sas with diamond +4 1/2" housing 30 spline longs and hub gears, hp elocker, six studs, arp studs in everything, taco rear with elocker. swaped out 22re for 3.4l supercharged, urd 2.0" pulley, urd fuel management, downey headers, flowmaster, cold air intake, marlin clutch that is straining to hold up
