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Please forgive my rookie questions.... Where should the ideal position of the needle on the oil pressure gauge be at? And what exactly does it mean to be "L" versus "H"? Mine is at the "H" THANKS
 

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It's all relative. If your car runs consistently at a certain level, it's probably okay. The best measurement is a mechanical oil pressure gauge to see how your system is running. From there, you can make adjustments to the oil pressure electric gauge (or at least know that your H setting is okay as is).

Another alternative is that your sending unit is bad and it's pegging the gauge.

Good luck with your diagnosis! /forums/images/icons/smile.gif
 

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The guage should show relative oil pressure in your engine...assuming noone put the wrong type of sender in (which would show max pressure even before you start the engine).

The factory guages have an incredibly overboard amount of damping in them which prevents us from seeing very quick dips in oil pressure. An aftermarket guage is much more accurate, though most of us get away with the stock guage forever without killing a motor.
 

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One possibility is that the oil pressure sending unit is designed for an idiot light, which would cause very high readings on a gauge.
 
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