The best oil for Rover V8's, given their fondness for eating cam lobes and distributor drives, is one high in ZDDP zinc. I recommend Valvoline VR1 Racing 20-50. "the pump gears were packed with grease in a bid to increase it`s ability to initially build pressure". Don't ever use grease for this -- only Vaseline. The best way to get the pressure up initially is to remove the dizzy and make up a steel dowel with the slot on the end, fit it over the oil pump shaft and run it with an electric drill on slow speed. The Rover engine does not need high pressure and relies more on flow and volume. 25-30 psi max is fine. Some people fit a stronger spring in the pump bypass valve in an attempt to increase pressure -- this can lead to an even higher rate of wear on the dizzy/cam drive.
