Ok. im going to put both of my problems with my car in one post. Maybe a little "math" can be done an we can see what happens. Some of you have read these things already so skip many lines. 97 3.8L. Ok, so first i would like to address the oil pressure gauge on the dash. When I idle at a stop light or have the clutch down while in a parking area, the little needle goes crazy close to the low pressure area. It's a rapid back and foward movement. When i press the gas it goes to what appears to be normal. A little over the half mark. Now the biggest problem! So, I had an oil change a few months ago. The oil is gone after a month . I pull out the dip stick and its dry (after four quarts the month before). So i'm having to add oil now every so often because it keeps disappearing. I don't know if it's a leak or if it's getting burnt up. Today i checked it and it was sooo dry. I had to put another quart till i do a another oil change tomorrow. Also, when i bought it we discovered a black gunk near the cap of the radiator. Almost as if it were oil. We flushed it. Also the resevoir had half radiator fluid half black gunk. We cleared that out as well. Replaced it all with new fluid. Ok, fast foward a year, and here I am today with the same problem. More gunk. Its a thick black sludge. I can run my finger around the edge of where the cap sits (inside of course) and i will get a thick sludge on my finger with a little bit of clear liquid around it. I was told by some guy that it could be a leak sealer. Wouldn't that have been washed out with the first flush. Then wouldn't there have been a leak. If its something differen't like oil, what could be the cause. Oil is causing so many problems for me! Ugh! please help. Now i'm hoping if i have both the problems present then i can find a better solution. I have ben told to rebuild, or get a new engine. Whats is the cheaper and better alternative. Ok about 170000 miles (estimated because odometer wasnt working when i baught it). Little black oil stains on my driveway and a little smoke out the tailpipe.