So I compete in hillclimb events in my 2019 VW GTI. I am running a VW 508 compliant 0W-20 oil (Total Quartz) to comply with warranty requirements. During today's event oil temps were at 252F at the finish line. It gradually cools to 235F or so while idling waiting to run back down the hill. The oil has about 2500 miles on it. Anything to worry about here?
While an oil temp of 235°F = 113°C is pretty normal for this kind of engine, 252°F = 122°C certainly isn't.
That's pretty close to where the ECU will start to cut some power and that's for a reason (it's somewhere
in the 120s°C I'm pretty sure). Oil temps that high along with high revs will likely affect the engine's life
expectancy in some way. So yes, that's a reason I'd worry about. As a consequence two things are required:
- bring down the temperatures >> alter coolant mix ratio >> use 35 % anti-freeze & 65 % distilled water
- change both engine and gear oil >> use a more stout engine oil (VW 504 00 5w30 or VW 511 00 5W-40)
Use either VW G13 or G12evo and distilled water only:
35 % anti-freeze & 65 % distilled water >> -20°C frost protection
40 % anti-freeze & 60 % distilled water >> -25°C frost protection
If required change coolant before and after winter. In any case change coolant frequently (3 - 5 years)
if you run a reduced anti-freeze content since anti-freeze also provides corrosion protection and less
anti-freeze won't provide sufficient corrosion protection that long as 50/50 mix would.
Btw., is your GTI stock? Is it DSG or manual? The very first and preferably very early gear oil change is
the most important one, no matter if you have a manual or a DSG transmission.
if anything, if you're using it in a motorsports capacity, more frequent oil changes. if not both before and after a "track day" at least after (or before you do another day)
While more frequent oil changes are a good thing, they won't help much in this case.
I think oil oxidation and wear metals are not the issue here, it's MOFT and temperature.
some manufacturers have a different oil recommendation for Motorsport vs street use. EX: ford on some of the higher strung mustangs recommend 5w20 for the street, and 5w50 for the track.
This isn't a race car, it isn't even a track day car. VW never made any recommendations for this duty.
The car comes with a built in lap timer, so it's not like VW didn't think that people will track these things.
This lap timer is a gimmick without any meaning.
Would 0W-40 Porsche C40 or 5w30 C30 oil, for instance the Mobil 1 0W-40 Euro oil or 5w30 ESP oil be good choices? How about mixing 50/50 with the 508 0W-20 and C40 0W-40?
Yes, both Porsche C30 5w30 (equivalent to VW 504 00) and Porsche C40 5W-40 (VW 511 00) are
excellent choices and by far better suited for this purpose. I'd recommend two oils in particular:
- Mobil 1 ESP 5w30 (VW 504 00, MB 229.51, 229.52, Porsche C30)
- Ravenol RUP 5W-40 (VW 511 00, BMW LL-04, MB 229.51, Porsche A40, not C40)
Please don't mix different grades, there's no need to. Choose between either 5w30 or 5W-40 or
use one in the winter and one in the summer season. I'd suggest to start with the reduced anti-
freeze and 5w30 VW 504 00/Porsche C30 oil and see what oil temps you get with this. They'll be
lower, that's quite certain. If it isn't sufficient you could try 5W-40 VW 511 00/Porsche A40/C40
next. Mentioned approvals are very demanding resulting in stout oils. Of course there are other
oils out there meeting the same approvals, however that's what I would run in your case. Mobil 1
and Ravenol's racing line are both very high quality and come along with reputable approvals.
I agree on very most posts made in this discussion. It's more important to protect the engine and
to avoid engine defects over warranty concerns since racing it already voids the warranty. I'm sorry
to say that, but if you really neet to retain your warranty you'd need to stop racing.
.