Installed a Z1 Oil Cooler Today - Something Doesn't Seem Right

alan93rsa

I haven't been on this forum for quite some time. It's interesting that oil temperatures are still a topic. What is hot and what is too hot always makes an interesting read.

I was quite surprised to see a 235F oil temperature in my Cayman GT4 while driving on an interstate highway in 80F weather. My first trip to the track netted a 245F peak temperature. On the second trip it was warmer and the oil temperature went to 254F. Porsche considers this normal for the GT4. Under the same circumstances my 15 GT3 runs at about 205F on the highway and doesn't get above 235F on track.

I had one of the first 370Zs in my area and the reason for selling it was oil temps hitting 240F. Fast forward to the GT4 and that temperature is considered normal. I was surprised to hear that from my SA.

Oil analysis on the GT4 factory fill Mobil 1 0W40 showed no issues at 2000 mi. including 2 track days. Changed to Motul 5W40 X-cess.

My opinion is run a quality oil and change it more often if you track the car. Especially so in hot climates.

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16 Cayman GT4, Carmine Red, Buckets, PCCB etc.