been trying to find the exact info i have been looking for but nothing so far. Anyway i have a S5 Na convertible and recently installed an oil presure and oil temp gauges (electric) with a sandwich plate adapter. Noticed a couple things the other day monitoring them. First off oil pres. under throttle when the car is at full temp is about 50psi which i assume is pretty normal. The first problem is at idle my oil presure drops to 19-22psi until i raise the rpm 100-200 and it goes to about 23-25 my idle may be low though so not sure if thats the problem. My real concern is with the temp. Everything heats up normally but upon driving the car in the highway oil temps got to about 190 and stayed there then when i was getting on it and keeping the rpm above 4-5k and downshift into 4th to get on it the oil temps got into the 210-220 range. To me that seems quite high which would idicate there is a problem.

Upon searching i saw people talking about a plastic lower shroud that directs air into the oil cooler which i am pretty sure my car is missing. Any other help is appreciated unless i am worrying over nothing and these numbers are all normal.

 

The oil pressures seem about right. Maybe a little on the low side.

Oil temps will go a little higher than coolant temps. I generally see around 180F during normal driving in 60-70F weather, but it can get as high as 215F if I push it hard. An upgraded radiator and the undertray can help keep the temps more stable.

 

I agree with RR88...your pressure is on the lower side of normal.
You could look into shimming/replacing the eshaft thermopellet if you'd like.

I can't offer an apples/apples temp comparison as my sending unit is in the oilpan, not on the pedestal.
My oil temp mirrors the water temp, pretty much one to one- if anything, maybe a little lower than he water.

I've removed the thermostat in the oil cooler, run a bellypan and electric rad fan and use 10/30w oil (if that matters).

 

yeah i am running 20w50 and it was about 70-80 the other day here. Already running a fiero e-fan. I may just go ahead and remove the t-stat in the oil cooler since its hot about 80% of the year here any way. I need to hook up my water temp gauge and compare the two but i am definatly thinking i need that undertray. If they continue this way i will be putting fans on the oil cooler as well.

 

Fans on the oil cooler would be way overkill, methinks.

If you are up for a project, better than the stock bellypan would be to craft your own ductwork.
The stock bellypan allows for a lot of the intake air to bypass the cooler/rad, you could certainly do better with some aluminum sheet and a bit of ingenuity.

Living in Atlanta, you face the double whammy of high heat and humidity coupled with gawdawful traffic.
I think ducting would gain you more than fans with the added benefit of no current draw, wiring complexity.