2025 Cayman GTS - Engine Oil Temp/Pressure Issue

[Arcam-Storm]

Good afternoon,

I took delivery of my new 2025 GTS (this is my first Porsche) yesterday and on the drive home (250+ miles) with 14c ambient temperature I noticed at 2.5k - 3k (cruising on motorway) that the engine oil pressure was between 1.9-2.0 bar and the oil temp was between 113-115c, these figures seem low and high respectively and I am hoping some other GTS owners could confirm if those reading are normal or that I may have a potential issue, the oil leave is showing as correct.

I tried contacting the dealer early this morning and sent a detailed email but so far that has gone unanswered

 

[Twinfan]

Oil temp sounds normal I think, the 4.0 engine does run hotter than older engines. On the road mine is regularly around/over 110 degC, it runs cooler on track (I have a GT4 which may have different cooling to the GTS).

I think the pressure reading sounds normal too, but it's not something I really look at or take notice of.

 

[Arcam-Storm]

Oil temp sounds normal I think, the 4.0 engine does run hotter than older engines. On the road mine is regularly around/over 110 degC, it runs cooler on track (I have a GT4 which may have different cooling to the GTS).

I think the pressure reading sounds normal too, but it's not something I really look at or take notice of.

Thanks you for your answer, the dealer has just emailed back to say it is "normal" for this car but my spidey senses were tingling

 

[Motorhead]

No experience with the 4.0L engine but I would have thought those figures are acceptable given what Dave has said [I doubt that there’s any major difference between the 4.0L GT4 and GTS]. An oil pressure of about 2.0 bar when cruising at those revs sounds about right, and I assume that the pressure picks-up with increasing revs?

Note that if the 4.0L engine employs a similar oil system to that used in the engines in the 987.2 and 981-generation cars it will use a DME-controlled variable flow oil pump, so the pressure maybe higher if you’re driving harder, e.g. in Sport mode.

Have you looked in the Driver’s Manual for any relevant information?

Jeff

 

[Arcam-Storm]

No experience with the 4.0L engine but I would have thought those figures are acceptable given what Dave has said [I doubt that there’s any major difference between the 4.0L GT4 and GTS]. An oil pressure of about 2.0 bar when cruising at those revs sounds about right, and I assume that the pressure picks-up with increasing revs?

Note that if the 4.0L engine employs a similar oil system to that used in the engines in the 987.2 and 981-generation cars it will use a DME-controlled variable flow oil pump, so the pressure maybe higher if you’re driving harder, e.g. in Sport mode.

Have you looked in the Driver’s Manual for any relevant information?

Jeff

Thanks Jeff, yes I scoured the owner's manual and could not get an answer, the type of oil system you describe is a new one to me. Thanks for listing its name I can now "Google" it <g>, I think I am correct in saying the 4.0 GTS used a dry sump system as well?

 

[Motorhead]

The 9A1 engine on the 987.2 and 981 uses a DME-controlled gear type oil pump and the flow is regulated by moving the slave gears axially with respect to the driven gears, thus changing the gear meshing and reducing power consumption depending upon engine operating conditions … rpm, load, temperature, etc.

Unlike the air-cooled engines the water-cooled engines aren’t dry-sumped, although the sump is very shallow and contains about 8-litres of oil. However, scavenging pumps are used to remove oil collecting in the camboxes of the boxer engine configuration.

Jeff

 

[Arcam-Storm]

Thanks Jeff, I appreciate the explanation and for correcting my dry sump assumption.

 

[Scrounger]

Even though the GT4 has the same engine it does run slightly hotter than the GTS 4.0. I’ve found it also depends on what fuel you run. I’ve started using Tesco Momentum rather than Esso and it runs about 4 degrees hotter. I wouldn't worry about it. The car is learning at the minute and will settle down.

Oil pressure sounds fine when cruising, just keep your eye on it. I’m not out in mine until Friday but I’ll take note and get back to you.

Dan.

 

[Arcam-Storm]

Even though the GT4 has the same engine it does run slightly hotter than the GTS 4.0. Ive found it also depends on what fuel you run. Ive started using Tesco Momentum rather than Esso and it runs about 4 degrees hotter. I wouldnt worry about it. The car is learning at the minute and will settle down.

Oil pressure sounds fine when cruising, just keep your eye on it. Im not out in mine until Friday but ill have take a note and get back to you.

Dan.

Thanks Dan, I appreciate that

 

[JohnCRS]

Just a thought, on the 981 sport mode engages the central cooling radiator and this drops the operating temperature by about 10C. I therefore always engage Sport or Sport+ if temp gets above circa 112C, especially on long runs in hot weather. Having said that, the engines seem quite happy at the higher temps and the central radiator will be used automatically if temp gets too high, say around 115C. I do not know if the same appies to the 718 4.0 engine. I would be interested to know.

 

[Scrounger]

So just to update as i said i would. Drove mine 40 miles today. Oil temp fluctuates between 98 and 104 degrees depending on speed. Oil pressure sits around 30psi when cruising at 70 and mod 20s when doing 30. So you’re sound about right. Engine oil temps will run a little hotter when the GPF is doing a burn so something to take into consideration.

Dan.

 

[Arcam-Storm]

So just to update as i said i would. Drove mine 40 miles today. Oil temp fluctuates between 98 and 104 degrees depending on speed. Oil pressure sits around 30psi when cruising at 70 and mod 20s when doing 30. So you’re sound about right. Engine oil temps will run a little hotter when the GPF is doing a burn so something to take into consideration.

Dan.

Thanks Dan, your oil temp is much lower than mine but my car only has 300 miles on it now it may well be related to breaking a tight engine in, oil pressure matches pretty much spot on.

 

[Scrounger]

Most probably. Give it another couple of thousand miles and it’ll settle down. At that point I’d strongly suggest having a geo done. The setup isn’t the best from factory.

Dan.

 

[Arcam-Storm]

Most probably. Give it another couple of thousand miles and it’ll settle down. At that point I’d strongly suggest having a geo done. The setup isn’t the best from factory.

Dan.

Sounds like a good idea as well as getting the oil and filter replaced, I am surprised there are QC issues on the Cayman, I have issues with door alignment that two dealers think are OK based off other showroom cars, I won't post that issue in this thread but may well raise another one to discuss other peoples finding.

 

[Motorhead]

Just another thought but it’s possible that during the initial running-in period the DME regime is slightly different, leading to higher engine temperatures?

As Dan has said, best to see what happens over the next 1,000 miles or so until everything has bedded-in properly.

Jeff

 

[Scrounger]

Sounds like a good idea as well as getting the oil and filter replaced, I am surprised there are QC issues on the Cayman, I have issues with door alignment that two dealers think are OK based off other showroom cars, I won't post that issue in this thread but may well raise another one to discuss other peoples finding.

Start a thread based on your car as a whole and put up any issues or how you're getting on with it, that way we can offer advice or suggestions. It would also be great to see the car and the adventures you plan on doing.

Dan

 

[Twinfan]

Sounds like a good idea as well as getting the oil and filter replaced, I am surprised there are QC issues on the Cayman, I have issues with door alignment that two dealers think are OK based off other showroom cars, I won't post that issue in this thread but may well raise another one to discuss other peoples finding.

Don't waste your money on the oil/filter change. My OPC even told me not to bother, turning down work. Just do the scheduled maintenance was their advice. No need for a change post run in.

In the GT4 track supplement an oil change is only recommended after 8000 track miles. So basically I don't need to bother between scheduled 2yr services and I don't. I've had my car from new, and after nearly 6yrs/24k+ road and track miles the car is running as good as it ever has.

It's a great engine the 4.0.

 

[Twinfan]

Just to add to Dan's data, I was out in my GT4 yesterday and my car was showing very similar numbers. Oil pressure seems consistent across the 3 cars and my temps were between Dan's and yours. My driving was mixed across motorway and A roads and I suspect temps go down a bit when having a bit of fun and go up a bit when cruising on the motorway to assist with fuel economy.

So I'd say all's good with your car

 

[Wollemi]

Oil temperature is always about 10º lower in sport or sport plus as the oil / water intercooler is engaged in those modes, as in the 981.