I had been running Chevron 20/50 and it had been about a year since change but its not driven much. I changed to 10/40 with a new filter over the weekend but the problem persists. When I first started it the oil pressure quickly came all the way up but after running it for about 2 or 3 minutes it would only come up to about 2 bar and did drop to 0 (even above 1500 RPM - red light came on) and then right back up to about 2 bar (even at 3000 RPM). Shortly there after the lifters started getting noisy so I shut it off. I need to put a mechanical guage on it (even though I suspect that these readings are correct) so if anyone has some info on the correct fitting connections, I would appreciate it. It may be an oil pump/relief valve but I have not heard of this as a problem in this engine. It looks like the pan will come off with the engine in the car but I am not sure. I am not looking forward to this project. At 60, everytime I get under a car not it wrecks my back big time. Craig

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90 300SL Pearl Gray
92 300CE Smoke Silver