Originally Posted by makris0000
Ok thanks. This is only my second car and my first one didn't have an oil pressure gauge.
I thought I replied to this, but I don't know where it went.
One of the reasons that manufacturers have tended to do away with the oil pressure gauge is that pressures change a lot depending upon engine temperature and speed. It's easier to use an idiot light than to educate the driver. The problem with the idiot light is that, by the time it comes on, the damage is probably done. If you pressure drops below the 30's while driving at normal speed, you probably should have things checked out ASAP.
This is also why the manufacturers put dampened temperature gauges in cars. A true reading engine temperature gauge would also vary a fair amount during normal driving, even if the thermostat is working properly. So the "normal" position usually covers a wide temperature range before it starts indicating hot or cold.
2014 Grand Cherokee Overland, 3.6 Liter, OAII, Adv. Tech Group