I've have 06 with a greddy turbo kit. I recently replaced my the sender, which was teed off the block, because I was reading low oil pressure. After replacing the the 'warm' oil pressures seemd normal (60psi at cruise and 10 at oil pressures idle), but the started up oil pressure was 80 at idle and up to 100 while the car was warming. It seems high from what i read, also it wold take a good 15-20 minutes of city driving for the car to get to the warm reading (which seems kinda long considering that it's been 80-90 outside).

I've moved the pressure sender to a sandwich adaptor today and the start up pressure was even higher (approximately 10 psi, 90psi at idle and up to 110 while driving until warm). Then after 15 minutes or so of driving i saw between 70-80 psi between 3 and 4k rpm. Before I turned the car off it was down to 10 psi at idle. Do you think I have a problem? I can't see how i could have messed up the install of the sandwich adaptor. Any input would be appreciated.

 

oil viscosity maybe...100 seems pretty high to me too...80psi at start up is what iv viewed...may have seen 90 once on another tc upon startup but that was with a cheap gauge.

 

I'm using 5w-30 mobil 1.

I've looked online and read people with high oil pressure attributed it to the pressure relief valve. Is that the same as the pcv? I just replaced mine, but maybe put a bad one in? I'm Also concerned about a blockage some where. Lastly, could it be the stock oil pressure switch went bad? Mine actually looks pretty rough and got a good covering of oil a while back when I had a oil small oil leak in one off the tees I had off the block.

Also, is this something I should be really concerned about?

 

So I just started my car for the first time today and the idle oil pressure was 90 psi. I just replaced the pressure sender so I doubt it is the gauge that is bad. Any thoughts on why?

 

if you have a clogged pcv and you capped off the other breather port (from vc to intake tube) you will have elevated oil pressure but most of the time it will cause quit a bit of smoke at idle.90 isnt too bad as long as its fairly quick to drop (within 2-3 min upon cold start up)

 

The car started very rough and idled at 100 psi. after three minutes of letting it idle it only came down to aobut 90 psi.

After a 10 minut drive to work on the highway, it was reading 85psi at 3k rpm and 20 or so at idle.

I haven't seen any smoke. I didn't have time yesterday, but tonight I'm going to buy a mechanical guage to confirm the readings are accurate and go from there. I just replaced the sender unit on my guage so I would be very surprised if the guage is that off.

 

Reading more about pressure relief valve, it seems more like the culprit. It sounds like it is not opening, which is allowing oil pressures to continue to increase, instead of capping at a preset amount. Anyone ahve any expeirence with this mechanism? From what I read, they are part of the oil pump.

 

So I bought a mechanical oil pressure gauge to see of my electric one is accurate. When I teed the mechanical gauge off the block, I got 60 psi from the mechanical gauge and 80psi from the electric gauge which is run from a sandwich adaptor at 4k rpm. When I ran the mechanical gauge from the sandwich adaptor I got 80 psi from both gauges at 4k rpm. Also, The oil pressures were pretty much the same in both comparisons at idle. These were both done with the engine warmed up.

So my electric gauge appears to be accurate. My question is why would my oil pressures differ by 20 psi (only under operation rpm not idle) when tapped from the block and tapped from a sandwich adaptor.