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I just bought a 1997 xj 4.0 auto and drove it 400 mi home. The guy I bought it from said he had just did an oil change and switched to synthetic 5w20... I know pretty light if you ask me even for winter, but whatever. On the drive home cruzin at 70mph I knoticed that the oil pressure seemed low reading between 30 and 40 at speed and dropping to like 15-20 at idle I was concered because in my MJ with the same engine it runs 50 at idle and 75 at speed when hot which I have never had any complaints about I run 10w30 blend in the MJ btw. I have had the xj for about three weeks and figured I would just do an oilchange and put in some 10w30 when the oil he had put in it was spent. Well now my oil pressure is like 5 psi at idle and maybe 10 when running down the road and I could smell oil cooking needless to say it is now parked untill I figure out what is wrong because I don't want to ruin the engine. I read somwhere on a post once that the pressure sending unit could cause faulse reading is there any way to tell if the sending unit is bad? I was also thinking about just putting a new high flow oilpump in because the rig has 161000mi on it so it couldn't hurt right? $80.00 bucks for the pump $30.00 for the sending unit what should I do any suggestions on how to figure out the problem, or advise on what you would do would be greatly appriciated i don't have alot of $$ thanks in advance. Us jeep freaks have to stick together! :help: p.s. I saw a mj parked at my work ill post a pic in the pub lol felt like a creap out in the parking lot at night taking a pic of someones mj :brows: :banana: