CAUSES? High oil pressure

CAUSES? High oil pressure

I think you should run lighter weight oil in it if a good mechanical gauge still makes it seem too high. I think a lot of you guys are loosing mileage and power if you are using thicker than 15w-40 if the engine has good bearing clearances on the street. I use rotella T myself for the Duster's engine. My next engine will have a hydraulic roller camshaft...will not be that worried about zinc...after a good break in (1st year of driving or so) on some break in oil, I'll probably switch to a good synthetic.

dodge freak said
I use high mileage oil in my 2008 with only 34,000 miles. Been doing it since I first got it at 28,000 miles--its on its 3rd oil change, lol. on the other 2008 I got, I switch to high mile oil at 15,000 miles, it has 85,000 miles now and all is good.

I figure te oil is more epa non friendly. Cars today are to last 150,000 miles and still pass smog, so the oil is very low on zinc and other good stuff, if the only says its for 75,000 miles or more, its likely has a tad more of the good stuff in it.

I used 10w-30, the cap says 5w-30 but if you read the owners manual 10w-30 oil is fine and recommended for higher temps. 5w-30 just gives a bit better mpg

My 340 gets 20w-50 racing oil, not street legal since it was first started

No need for high-mileage oil at all. I have a 2004 Colorado with 104,000 miles. Has had nothing but Yellow Bottle Pennzoil 5w-30, and Purolator standard filters since I purchased it at 25k miles. Change it every 4-5k. Oil pressure is the same as when i put the oil pressure gauge on it at 30k. You could eat off the inside of this thing. Uses and leaks absolutely ZERO oil. The stuff has a lot of detergents in it, keeps it clean, purolator oil filters are good.

Also used to have a 1988 Oldsmobile Cutlass Supreme that had the same (previous owner also subscribed to my fluids/intervals), ran absolutely amazing at 200k miles when it was retired. It leaked about 1/4 quart after 3k, and that engine worked hard (3200lb car with tall gears, automatic and 125hp/155lb-ft)