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Last post, for sure. What does oil do as it gets hotter, like when you are transferring more heat into it because you can't cool your commuter 2.0L engine's pistons 😂? Surely, if your argument made any sense, manufacturers would be recommending thinner oils on track not thicker oils on track.

Refresh and read my update, sorry posted too soon. I'm done wasting my time anyway. Never said a word about bearings either. The idea of little EA888 needing CAFE oil to cool its pistons is pretty funny.

Maybe you should take a basic physics course. A basic 0W-20 is around 8.8 cSt KV100. Mobil 1 FS 0W-40 is 13.8 KV100. This difference is nothing compared to what the engine sees during the course of warm-up even if you start the car in Phoenix in the summer. The 0W-20 is 3x thicker than that 13.8...

Not really, not at least within the window we are talking about. A 0W-20 at room temp 25C is around 4-5x thicker than the 0W-40 at operating temp. The engine must be designed to operate from sub-zero temps to death valley and under heavy load. If the increased viscosity difference from a 20 to a...

But we do know why. They spec C because Macan has GPF/OPF to meet emissions. They spec 20 not 40 for fuel economy because the intended use of a Macan is not 5000 laps on the Nurburgring. In a world without CAFE and EU fuel economy or CO2 standards every Porsche would use A40/C40, yes.

Well, it's probably not as complicated as we think for most applications. I don't have the PDFs in front of me but C20, C30, A40 largely meet the same basic specifications in terms of wear. C specifications are mid-SAPS to be compatible with cars that have GPF/DPFs. The 20,30,40 is just simply...

This is only true at the top end of the spectrum. You can pour Porsche C40 ESP X4 0W-40 into almost any car and it will give fantastic results, even cars that call for Dexos 1 or some of the lesser Ford / Stellantis specs. Conversely, you cannot pour that Dexos 1 or Ford oil into a Porsche 911...

Well, when the test limits are largely harmonized except A40/C40 add a track test that does not exist in, say, DexosR or BMW LL-04, then you could say in one regard it is more stringent. All engines are more similar than different, which is why most oils carry numerous approvals at the same...

Did I ever say DexosR is inferior? I did not, it is ACEA C3 based and I said that pages ago. It is probably not quite as stringent as the German sub-standards but it is at least ballpark.

Because their Euro is the closest thing to DexosR which is a Euro spec for all intents and purposes. Even HPL believes their Euro is a better add pack because that's what their Supercar oil is based on (a VW package if I recall correctly). If you can't understand it after all that has been...

I'm afraid you are missing the mark completely. Dexos2 became DexosR. Dexos2 is a Euro spec (C3 based), thus GM's best spec is Euro based. The only reason FS was not licensed is probably because it is full SAPS (not a bad thing for cars without GPF), the same reason BMW does not license it for...

Euro. But I am an ESP X3/X4 fan if you want to stay M1. It's a tad bit better than GM Supercar version in HTHS (3.8) and viscosity retention it seems.

Dexos R is just Dexos2 renamed. The Porsche oil ESP X3/X4 has met Dexos2/R with no changes from day 1. The reason FS was not Dexos2 or Dexos R is because FS is ACEA A3/B4 based and Dexos2/R started out as a mid-SAPS ACEA C3 based standard. Dexos2 originally targeted diesel vehicles (Opel) as...

Should be at least 10 min at operating temp but honestly the last drive I do not remember.

What I'm not sure about here is the fuel dilution. I think every time it was driven it was taken to full 100 C oil temp. This is also port injection not DI.

Preventative, they do wear rapidly on S54 although failure is not nearly as common as in S65/S85.

Until I do rod bearings, so probably not longer than 2k miles.

I bought this car last fall with 91k miles and immediately changed the oil, that is the first sample. I have no idea what oil it was or how long it had been in there (not long judging by TBN and visc), but it most likely was Castrol Edge 10W-60 or Motul 10W-60 with remnants of Ti from a previous...

I could run a 20 but it's no fun 🤣

This oil came out of my car at 13.5 cSt according to OAI. Blackstone needs to have a hard look at their viscosity setup.