From what I have seen in my own car, the oil pump isn't variable speed. Just from memory, I typically see about 1 bar per 1000 psi:

~10psi at idle (600-700 rpm)
~1 bar at 1000 rpm
~2 bar at 2000 rpm
~3 bar at 3000 rpm

I haven't paid too much attention to the oil pressure at higher rpm.

This is using Pennzoil Platinum 0W-20 at ~200f.

Whoa nice destroyed engine..but there's no relation to oil pressure and engine damage at this point from that one example.

Woooo 470 lol I get the same its so quite when cruzing but wot ppl like WTF lol

http://www.ft86club.com/forums/showthread.php?t=28713

Seems like Dave is not losing pressure at the dip either. Although he state that oil pressure start dropping once past 7000rpms according to his post.

numbers getbent posted are about same as daves. all depends on oil and ambient temp and what not

TRU I USE 10W-40 NOT that stock water 0-20 lol

So I have the Innovate Oil Pressure/ Oil Temperature in one gauge. It has logging capabilities. Went ahead and did several logs from 2K RPMs to 5-7K Rpms.

Including WOT, full boost, partial throttle, very light throttle, cruising.

ALL of the time, the oil pressure graph NEVER drops one PSI while increasing RPM. It looks exactly as expected a line continuously going up. I will post up pics when I trim it as the whole log was 18 minutes.

Again, it might be true its variable drive, BUT it does not appear to be loosing pressure along any RPM range.

EDIT: I'm using Motul 8100 0w-30 Oil.

I'm having a really hard time imagining it being variable drive. Oil pumps are typically the most reliable thing on a car. They are shit simple for a reason, so they don't break.

Yeah I have a hard time believing they'd go through the complexity of putting a variable drive just to slow down oil feeding at higher rpms. If anything they'd want to raise it to push more circulation.

Maybe on a high end (LFA type) car they'd do that sort of thing but lets face it, our FR-S is a budget car and doesn't have very many luxuries.

I posted various bits of info over time. I wasn't organized enough to keep a real log :(

As far as temps, I never saw over ~235 with the cooler at Sebring in hot weather, where others locally without the cooler are hitting 290-300+.

In my car it stopped DROPPING big time at high RPMs with 0W-20. 0W-30 fixed that though. In theory with less flow.

Stopped...? Did you mean started? Do you recall how low the pressure got? Or if there was any corrilation to temperature? What brand of oil were you using?

Thanks Dave.

Yes started :)

I don't do high RPMs until it's warm of course, but temps varied a few degrees during that testing which was on the interstate with the cooler installed. It's extremely repeatable though regardless of temp (ie warm or hot).

That was Mobil 1 0w-20 I believe. Currently it has Redline in it. Right after that mobil 1 testing I switched to Xw-30 Royal Purple. Pressure stays good all the way.

20 weight is good for fuel economy though. :shrug:

You have not gone FI with your car, correct? Also the pressure dropping with the 0w-20 is under normal driving conditions and temps or were you wringing out the car/motor?