Not to rain on this parade..

That'* very untypical

Mobil 1 stays more consistent through the time it'* in the car and breaks down less.. but unless you were using a 0w-30w or 5w-30w .. and now the 10w-30w mobil 1.. you shouldn't see a change in pressure.

Yeah, I know, but it is still amazing the difference that was had in his experience. Maybe the filter had something to do with it. He said K&N right??

Ok to clear this one up the car had 5w30 Walmart SuperTech in it with same ST filter. When the oil sender went I lost about 2 quarts. I put in 2 quarts of 10w30 to get it to the shop that did the sender. I also took a 3rd quart of 10w30 with incase I couldn't make it all the way there. The guy at the shop said he used the third quart after he changet the sender, but when I was under the car to do the oil change I noticed a Fram filter. So I am not sure which weight oil was in there after the sender replacement, but I do know that it was at least 3 quarts of 10w30. I am pretty positive that I read Haro or someone else had a jump in pressure from the Mobil 1. Unless its the K&N filter but I doubt it. I don't know what it would be that bumped it up, but its definitely up compared to before.
As a side note I have tried Lucas and found it to take care of lifter ticks, but when I put it in my wifes Lumina to quiet down the non piston skirt slap it got louder. So the next change will be to Mobil 1 and a K&N filter.

Ok, in my factory service manual for 1993 Bonne, pg 6A8-23, Item 6 under "Testing Oil Pressure" says "Pressure should be approximately 414kPa (60 psi) @ 1850 rpm using 10w30" under normal operating temp.

And then on Page 6A8-50 under engine specifications, Oil presure is again shown (at operating temp) as 414 kPa (60 psi) @ 1850 rpm.

My Haynes manual agrees with that.

So, I've picked up a replacement pressure sender, and intend to put that in Saturday. Got it at Advance for about $25.

Other than that a planning an early oil change with an AC-Delco filter, other thoughts on high oil pressure?

thanks all.....

Jason

93 Bonne SSE w/ sc., 149000 miles.

Does the old rule of thumb, 10 psi per 1000 RPM, apply to our engines?

Mine pegs 80 most of the time lately, its gotta be the sensor, cause it cant be that high with almost 200k on an untouched short block

Good luck on getting that pressure on that age car.. warmed up.. 40-50 is most likely what you'll see.

My car has never had less than 40psi. When its cold and idling, the PSI is generally 60 or above. Hot and idling is usually 45psi. Also, my pressure fluctuates very little with rpms. All this stuff leads me to distrust these electronic sensors. If you are worried, go have a shop put a mechanical sensor on it.

Mine was about 60 stock but is pumped up to about 80 psi now with the Oil volume kit from ZZP.

95 with the same issue. Can someone tell me where the oil sending unit is located on the car and the price for replacing it ? The old girl has 150 K on it but still runs and drives great so I really hope it'* not the bearings. Thanks Garbo

If I remember correctly, when the sending unit goes, the gauge goes to 120PSI, at least mine did. In any event I just did this so i can help you. I took the the pass. side wheel off, then the back piece of inner fender(the piece tword the back of the car) and boom, it was right there can't miss it! It was the easiest thing to date I have done to this car. Oh, when you go buy one there are 2 different kinds say the auto parts guy, the one you want is the bigger one, at least thats what mine was. As far as price, I would say 15 or 20 bucks. I used a big cresent wrench to get it out and put the new one in, remeber, not too tight, just snug.....