650WHP 2018 Audi S5 Oil Recommendation?
- Thread starter redbeardmcgee
- Start date
Wow that's a lot of 034 Motorsport upgrades. I had their Stage 1 for a minute but it caused cold start issues and Customer Support was brutal. Not sure if it was ChatGPT responding to my emails or what. Won't make that mistake again (though the tune was nice).
Believe it or not, Audi-recommended Castrol Euro is just fine. That being said, you could throw some Motul in there - 300V or 8100 x-cess. Liquimoly is great too, just make sure it's the one that is 502/505 approved (Leichtauf High Tech?)
While you're in there, switch to Motul for the transmission, too.
What did Stage 3 end up costing you, if you don't mind me asking? Also, sorry that you're stuck with 91 octane
Believe it or not, Audi-recommended Castrol Euro is just fine. That being said, you could throw some Motul in there - 300V or 8100 x-cess. Liquimoly is great too, just make sure it's the one that is 502/505 approved (Leichtauf High Tech?)
While you're in there, switch to Motul for the transmission, too.
What did Stage 3 end up costing you, if you don't mind me asking? Also, sorry that you're stuck with 91 octane
Last edited:
edyvw
$50 site donor 2026
300V is racing oil. It is not suitable for street driving.Wow that's a lot of 034 Motorsport upgrades. I had their Stage 1 for a minute but it caused cold start issues and Customer Support was brutal. Not sure if it was ChatGPT responding to my emails or what. Won't make that mistake again (though the tune was nice).
Believe it or not, Audi-recommended Castrol Euro is just fine. That being said, you could throw some Motul in there - 300V or 8100 x-cess. Liquimoly is great too, just make sure it's the one that is 502/505 approved (Leichtauf High Tech?)
While you're in there, switch to Motul for the transmission, too.
What did Stage 3 end up costing you, if you don't mind me asking? Also, sorry that you're stuck with 91 octane
I would be surprised if all 4 of these have the same HTHS. I was under the impression that Molygen had lower HTHS then its peers.
I would agree that 0w40/5w40 is a better choice for you, and considering you are running high alcohol fuel, you want something that can withstand some level of fuel dulition, even if you change every 5k miles. If this was mine, I would either go fancy with Motul 300V (short oci) or HPL (long oci), or go with something good value such as PUP or Mobil 1 European. If you are living in the USA, I don`t think LM is really a good value proposition.
edyvw
$50 site donor 2026
300V is racing oil. It won’t do good in street driving.
SuperCar 0w40?
edyvw
$50 site donor 2026
Sure, why not. You mean HPL?
4wd
$50 site donor 2026
For clarity - HPL Super Car?
Of course.
edyvw
$50 site donor 2026
Bcs. Mobil1 has Supercar. That is why I asked.
I figured I’ve been called an HPL fanboy enough times on here that it would be taken for granted that’s what I meant. Apologies for the confusion.
4wd
$50 site donor 2026
Long enough to have reached fan man statusI figured I’ve been called an HPL fanboy enough times on here that it would be taken for granted that’s what I meant. Apologies for the confusion.
Used to be. The current forumatlion is more street friendly
edyvw
$50 site donor 2026
Friendlier than last? Perhaps. Friendly? No.
We did some testing here, there are still a lot of deposits and high evaporation loss. I used that on street and returned excellent UOA. But, that doesn’t show whole picture.
Sounds like you know something I don`t. I can imagine the deposit part, but surprised on the evaporation loss.
Motul`s technical team explanation to me was that it is a much better version of 8100 line, and perfectly good for 3 to 5k miles OCI on a street/track dual use vehicle.
edyvw
$50 site donor 2026
Actually they have dual oil, Power. Motul always has API certification for dual oils.
Member did here test on deposits and evaporation loss. I have sent him samples.
edyvw
$50 site donor 2026
All in one photo.
Thank you verymuch for sharing that. I have to say this very puzzling for me. His findings are definitely against my apriori, and even though his testing method is not perfect, it is very sensible, and empirically looks reliable enough since he is also testing against a known reference sample.All in one photo.
The thing that does not make sense to me is, the previous formulation they used had a noack that is half of what JAG is calculating here. Just the sanity check wise, it really does sound wrong to me that their noack doubled moving from a racing focused formulation to a street friendly formulation. Espeically also given that they emphasize this formula being catalytic converter friendly, there must be something we are missing here. But given this, if I were the OP, I would definitely go with HPL supercar over 300V. Especially also considering they cost pretty much the same
edyvw
$50 site donor 2026
This is still pure racing oil. I don't think they advertise on bottles that are street-friendly. I will check tomorrow in the garage.
Like I said, it might be friendlier than the previous, more ester-heavy version (I actually still have that, need to use it), but it isn't dual oil like Power is, or HPL BAS.
It returned excellent UOA for me. Strictly street driving. I wanted to do only the street to check it. Oxidation was in check:
I highly doubt Noack is that high, but it is high nevertheless.
I don't think i have ever seen an oil bottle saying the oil is street friendly, no matter the brand/product line.This is still pure racing oil. I don't think they advertise on bottles that are street-friendly. I will check tomorrow in the garage.
Like I said, it might be friendlier than the previous, more ester-heavy version (I actually still have that, need to use it), but it isn't dual oil like Power is, or HPL BAS.
It returned excellent UOA for me. Strictly street driving. I wanted to do only the street to check it. Oxidation was in check:
I highly doubt Noack is that high, but it is high nevertheless.
But Motul's tech advisor was very clear to me that they would target 3 to 5 thousand miles with dual use
Similar threads
