Q: How do I diagnose an oil gauge problem?

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When I turn on the truck every morning, the oil gauge needle moves to the higher side, but still in the safe range. After I get off the highway and stop, the pressure goes back to normal. Then I start driving again and it goes to the same range again. I have had an oil change, and nothing has changed. What do you think is causing the oil gauge to fluctuate like that?

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