OTH, the 87 300D that I once had, had a fluctuating oil pressure gauge. The first time when I noticed the oil pressure gauge was at 0, I nearly had a heart attack. I was on the freeway after just picking it up from the guy I bought it from. It wasn't making any noise. I almost thought about turning around and returning the car. The next exit was over a mile. So I also watched the temp gauge at the same time and it showed normally. I was thinking the temp would go up too if there was something so catastrophic as lost oil pressure. No odd odors either. So I was hoping it was only a bad gauge which it was.
You can't always trust gauges.

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DJ


84 300D Turbodiesel 190K with 4 speed manual sold in 03/2012