ben2go
OBS Enthusiast
I'll look into that oil thing. I wasn't aware they changed the diesel oils. Thanks for the heads up.Don't agree. The Rotella T hasn't had the higher zinc since 2007 or 2008 from my sources.
Use whatever brand and viscosity you deem appropriate.
I recommend contacting the oil manufacturer and asking them "What oil is o.k. for my PERFORMANCE FLAT TAPPET CAM".
A factory 91 cam with 91 springs is probably fine with the new oils but it's a horrible mess if it eats the cam.
Oil is cheap.