I have a '95 Ford Club wagon with a 5.8L V8 engine with 121,000 miles. Runs great. Before BITOG, I never paid attention to the oil guage on the dash. It always read in the "normal" range. But now that I am a little more oil-anal, I actually look at the oil guage more often. The guage is not an idoit light. It is a needle guage that ranges from low to high with the word NORMAL printed in between low/high. Usually the needle rests on the letter M with the engine running. Sometimes the needle rests in the middle of the M. Sometimes to the right of the M (ie: higher oil pressure) and sometimes on the letter A (even higher pressure). Once I noticed these fluctuations, I decided to use different brands of oil filters to see if that affected oil flow, and perhaps the guage readings. I do not believe that to be the case now. So far I've used a Pure One, Purolator, Motorcraft FL-1A, and K&N filter. In all cases the needle varied the same. And there seems to be no pattern to rpm's, temperature or road speed. I've seen it settle on the M at cold start up as well as going 70 mph down the freeway. I've also seen it move right to the A at cold start up as well as when driving 70 mph. And of course I've watched it move slowly from the M to the A, and vice versus, as I'm driving. I guess what I am saying is that I have been unable to observe a pattern to the different readings. My Haynes manual says normal oil pressure for this engine is 40-60 psi @2,000 rpm and normal operating temp. Of course I have no idea what psi any of the letters in the word NORMAL on the guage correspond to. I'm beginnig to think these "M to A" readings are all normal and if I'd only looked at the guage years ago, I'd have seen the same sort of fluctuation. Does that sound reasonable?