I have been running a 5W-40 Rotella
Synthetic Diesel
Oil in my FE. The prior owner ran it and it seems to work fine. However, I am curious as to what others are running. I have a 468 Shelby Block.
Oil pressure stays up and runs high most of the time with the exception when it gets really hot out and then pressure drops a little. I think the prior owner ran the above
oil due to a warmer climate in Va. and since the car has been in Ohio it takes a little time to warm up.
Phil