My Jeeps oil pressure

I have a 1997 jeep wangler with 118,000 miles on the 2.5L engine. The oil pressure is good at start up. But when the engine gets up to temp the pressure drops some. When I come to a stop the pressure drops to nothing, then when I start moving again it comes back up.

Both the 4.0 and the 2.5 share the same oiling systems. Both engines tend to have low oil preasure when hot at idle. The stock electrical oil press. Sending unit is not verry accurate and may read 0 but in all actuallity is may be pusshing 10psi. Do yourself a favor and get a mechanical oil pressure gague. Run only a good 20/50 oil, like dello 400 or a diesel spec. Grade oil. I have built numerous 4.0 and 2.5l engines and have had the best luck with Castrol Act-Evo 20/50 oil. Its a motorcycle/atv oil and is a little bit spendy but worth the money. On a hot summer day with the A/C going sitting at idle your engine will be just fine if its seeing at least 8 true psi. Your oil pressure is the most important tool to tell how your engine is doing. Its more important than water temp, cuz your oil press will tell you if your eninge is hot. Dont skimp on your oil or filer. WIX!