Today I changed the plugs, oil and filter. Engine seemed to be running well.
Oil pressure 87 on the runup. I didn't hear anything unusual, but an
observer on the ground said I had a misfire or two on the take-off roll.

I did a pattern. Oil pressure 65 on the downwind at 3600 rpm. After a low
pass, which apparently sounded sweet from the ground I headed south a few
miles and climbed above the class C. By the time I was over the field at
5000' the oil pressure was 24 at 3500 rpm, coolant temp was 230 and oil 220
(much higher than usual). I began a descent. At minimum throttle temps went
back below 200, but oil pressure was around 20 - 25. Engine began running
rough. Richer mixture smoothed it out. I had the mixture at a 4 pm setting.
Anything leaner and it faltered. Switched off one set of injectors (the
primaries I think) and it ran better.

On short final at idle oil pressure was in single digits, and as I taxied
back to the hangar it was actually reading negative.

Y'know - I'm getting really sick of this.

John (hoping for a positive attitude in the morning)