Higher Oil Temps After Sw Update??

[rijndael]

Non PP car; no oil cooler in the algorithm.

AC off my oil temps are 230. AC on, I'm 190-210.

Sponsored

 

[MidLifeCoyote]

Non PP car; no oil cooler in the algorithm.

AC off my oil temps are 230. AC on, I'm 190-210.

Seriously ... if you're going to compare oil temps, you need to also mention AC status. It matters.

Can I get a quick explanation of how AC on lowers oil temps?

 

[rijndael]

Head temp definitely factors in to the oil temp algorithm. I'd guess that head temps are naturally lower when the AC is on because the radiator fan is on high?

I don't know the algorithm details, but I do know it matters. It's pretty repatable for me.

 

[LouG]

Agreed. Not sure why people trip out when they see it over 200F or 220F.

That said, the OP is running temps higher than me right now. And live on the surface of the sun. I still don't think 230 is concerning on its own, but he says it's suddenly much higher than normal...IDK what to make of that.

It might be the boiling point thing, but even coolant can go over that when pressurised.

 

[MidLifeCoyote]

Head temp definitely factors in to the oil temp algorithm. I'd guess that head temps are naturally lower when the AC is on because the radiator fan is on high?

I don't know the algorithm details, but I do know it matters. It's pretty repatable for me.

I just confirmed this for my car, on highway at 70mph 80F ambient. For reference again, I have 2024 GT non-PP A10.

AC on is 197 CHT and 215 Oil Temp
AC off is 212 CHT and 230 OIl Temp


I got $1000 that says my car (and probably others) was stuck on the "AC on" fan maps all the time and this update fixes that. AC on during this test is exactly how my car has ran with AC off for its entire life.

 

[Frogdog1]

I just got back from a 40-50 mile drive in all kind of conditions, AC on.....city to open hwy at 80, to a couple of semi-hard pulls and my oil temp never got above 225. My oil stays a little below 210 F most of the time with AC on in town when warmed up in 88 degree ambient temps.

Non PP, 3:15 gears, A10, no oil cooler. My software says it's up to date. I find the OP oil temps. to be running higher than mine. Separately, going from non-synthetic to synthetic should lower temps. if anything....from another poster's comment. FWIW

 

[Starship Enterprise]

I'm a windows guy, so AC off.

In this car and my 06 GT, I could never drive over 50 with the windows down. The wind buffeting gets unbearable. It blows in and gets trapped behind me and causes horrible noise and back pressure.

 

[Frogdog1]

In this car and my 06 GT, I could never drive over 50 with the windows down. The wind buffeting gets unbearable. It blows in and gets trapped behind me and causes horrible noise and back pressure.

Be careful you don't get blown out....

 

[rijndael]

Separately, going from non-synthetic to synthetic should lower temps. if anything....from another poster's comment. FWIW

But, there’s no actual temp sensor, it’s calculated. So, I don’t think the display will notice it. The PCM doens’t know if you have conventional/semi-syn/full-syn, even though those terms are a lot of marketing fluff anyway.

 

[Starship Enterprise]

Be careful you don't get blown out....

I'd pay extra for that...

 

[Frogdog1]

But, there’s no actual temp sensor, it’s calculated. So, I don’t think the display will notice it. The PCM doens’t know if you have conventional/semi-syn/full-syn, even though those terms are a lot of marketing fluff anyway.

Well, I don't know how the car measures temps. Synthetic oil does have better attributes than non, and no, I'm not going to start a war on that. Those terms, used properly, describe different lubricants with measureable differences and properties. Over and out.

 

[AZ_Ryan]

It might be the boiling point thing, but even coolant can go over that when pressurised.

I was referring to oil temps.

 

[AZ_Ryan]

Well, I don't know how the car measures temps. Synthetic oil does have better attributes than non, and no, I'm not going to start a war on that. Those terms, used properly, describe different lubricants with measureable differences and properties. Over and out.

Right. But what he's saying is the oil temperature in these cars is determined by a computer algorithm, and the computer doesn't know if you are using synthetic blend or full synthetic. Because of that, you likely won't see a difference in the gauge.

 

[rijndael]

Those terms, used properly, describe different lubricants with measureable differences and properties

I don’t know what “used properly” means. Historically, synthetics were group IV (PAO). Then Castrol had to screw it up. Now you have something starting out as a group I or II being modified … now being a III and is classified as synthetic.

It’s just too general of a word to make blanket statements.

 

[AZ_Ryan]

@MidLifeCoyote I did not notice a difference in my oil temps today after the update. It was 106⁰ in Phoenix today. I'm still running around 206⁰-212⁰ oil temps during normal cruising. If I get "spirited" it goes up several degrees and then drops back down.

I got to say this theory that running the AC somehow lowers oil temps is both interesting and bizarre.

Sponsored