So a short while ago, my oil gauge was reading at the low end of normal and so I topped off with 200cc oil. After doing so, I noticed the oil pressure to read quite high under heavy loads/high rpms, etc. I never let it go into the "red", but that also meant that I haven't been driving my car really hard. The oil gauge did read "max", but I also got the "oil level is correct" message. Now my oil gauge is reading one notch below max, but I am still getting high oil pressure readings with hard driving.

Anyone have any idea why this may be happening?

 

Wait what car? If it is the cup motor it is normal for it to go to the red under hard driving. Mine goes to like 60-70 PSI. I don't think Porsche re did the scale for the cup motor.

 

A friend with a Spyder RS noticed the same thing. Porsches answer to him was that they simply didn't recalibrate the gauge for the GT3 motor.

If you have a base GT4 then this might be a concern. If you have an RS, it's normal.

 

Non-RS Spyder.

 

I think that mine pretty well followed what the OM said to expect.

 

The manual specifies minimum oil pressures for given rpms. It does not specify when oil pressure is too high.

 

Almost certainly not an issue. What exact readings (in Bar or PSI) are you seeing on the gauge? When the oil is full operating temp, you should not see over 75psi or so at any rev or load. But in general, high oil pressure is a rare condition and not nearly as dangerous as low oil pressure. The pressure will build with revs, but then flatline. So, don't assume the pressure will continue up as you rev close to redline.

 

My experience is the oil pressure roughly matches the RPM/100 once under load, so up near 70 approaching 7k RPM.

 

Once at full temp, I think the pressure stops rising somewhere around 5,500 rpm (but 70 psi is about right). The old rule of thumb since the aircooled days is 1 Bar (a little over 14 psi) per 1,000 rpm. Modern cars are not too far from this either (but there is a plateau where the pressure stops rising). 10 psi per 1,000 rpm is a good minimum benchmark.

If the oil is not up to full temp, it'll be thicker and build pressure more quickly.

 

I am seeing low 60s at which point it is nudging the red zone. I just don't recall it being this high before, that's all.

 

Low 60's is perfectly fine (unless revs are more than 6k rpm - then it's a little low). The Red zone is probably not very well located.

 

I've had it up to 69-71psi on track almost going into redline...completely normal

 

With how thin this C40 oil gets at higher temps, I'd imagine a higher pressure is ideal to protect the rod and main bearings.

 

Spouse has a 2024 GT4 RS. I took it into the dealership this morning - it was reading 71 psi just after a cold start, and even after the engine warmed up it was still at 68 psi. Drove it for an hour on the highway on Sunday and it was at 65 psi at 3,800 rpm, 73 mph, 7th gear.

Reading the other comments in the thread, seems like maybe this is normal? But 68 psi at idle?