Thanks, Chris and Pete. Thought that was the case re, the PRV. My oil pressure drops to around 4or 5 once warm, and rises to 10 when revved. my jets are clean but may try Peter's idea also. thought mat PRV not opening. My oil stick suggests it's a little overfilled.
Rob
Mike, my standard 3 bearing engine has Morris gold film 20/50 engine internals are very clean.
Rob
Mike, my standard 3 bearing engine has Morris gold film 20/50 engine internals are very clean.