It was and it is still fluctuating like crazy. From 3 to 0 anytime. Just as you described yours. Sometimes it stays at 3 for a while but then it starts to jump like crazy.

It could be a bad sender. Those are not expensive. If you really had low pressure (oil pump problem or something) the temperature will climb fast and the engine could be in danger. If you temprature is normal and oil level is ok, it is the sender or some electrical problem.

My car is in the shop now for a transmission repair (#$%%). When I get it back, I'll take it to a different place to have those wires replaced.

Let us know if you find the problem in yours!

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Juan
1995 E320 Sedan
2008 Ford Escape
RC Helicopter