No it does not.
Euro oil spec thats better than dexos 1/r?
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OVERKILL
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I mean, that's why GM is now spec'ing QS 5W-30 for the 6.2L that's been having bottom-end issues and giving it DexosR, not FS 0W-40. Oh, wait a minute...
They are giving it ESP (Supercar) 0W-40 but your point still stands.
OVERKILL
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Did you see the list? FS is on there too from what I've seen. We went from having 1x dexos R lube to 3x.
I also like the blurb that dexos R oils meet or exceed the performance of both dexos 2 and dexos 1 Gen 2 and Gen 3.
Interesting, did not know FS received DexosR. The Mobil PDS does not show it yet.
The TSB from GM shows the oil used as part of the recall campaign is PN 19432866 (US) / 19433272 (Canada) which is the Supercar / ESP 0W-40. Of course it does say just DexosR so you are correct that FS would qualify based on that table.
OVERKILL
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Which is pretty amusing given some of the talk earlier in the thread about dexos and Euro specs being different and dexos being a better choice for GM applications, while here we have a Euro oil literally just slide in and get the top dexos approval overnight, which qualifies it as exceeding the performance requirements for both dexos 2 and both gen 2 and 3 dexos 1 specs that it was argued it wasn't appropriate for...
Yes and most DexosR (Dexos2) oils are just ACEA C3 in reality.Which is pretty amusing given some of the talk earlier in the thread about dexos and Euro specs being different and dexos being a better choice for GM applications, while here we have a Euro oil literally just slide in and get the top dexos approval overnight, which qualifies it as exceeding the performance requirements for both dexos 2 and both gen 2 and 3 dexos 1 specs that it was argued it wasn't appropriate for...
Which is pretty amusing given some of the talk earlier in the thread about dexos and Euro specs being different and dexos being a better choice for GM applications, while here we have a Euro oil literally just slide in and get the top dexos approval overnight, which qualifies it as exceeding the performance requirements for both dexos 2 and both gen 2 and 3 dexos 1 specs that it was argued it wasn't appropriate for...
This is actually kinda wild. I wonder if GM expedited the a approvals because of the 6.2L issues and were just like, "Mobil 1!!! You're it!"
Or if Mobil had been working toward DexosR approval for a while.
OVERKILL
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Well, I think it underscores that the Euro standards are superior to dexos, as this oil took zero reformulation to get rubber stamped with the highest possible dexos level.
Right, no reformulation required, but the GM 6.2L crowd wasn't the target market for that oil. So did GM just "rubberstamp" as you put it, or had Mobil actually already submitted it for evaluation ( p.s. I have no idea what Dexos testing entails).
Or did GM fast track the testing out of necessity (and a pre-existing relationship).
edyvw
$50 site donor 2025
I think they added it to their list as M1 0W40FS is readily available so that customers can buy it with confidence.
This is GM basically giving approval to a company that did not ask for one bcs. of convenience for their own customers.
Why would Mobil1 seek dexos approval for a euro oil? It would certainly meet it but they have other oils that meet it easily. Why spend money on a lower certification?
OVERKILL
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If you go up-thread, you'll see the argument was made that Euro approvals were inferior to dexos for GM applications and that everybody recommending Euro lubes were effectively half-wits. This clearly doesn't seem to be case however, since a Euro oil was just rubber stamped for the grand poohbah of dexos approvals basically overnight, which happens to cover all other dexos approvals as well.
edyvw
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They do, but R is more difficult to find than FS, and it costs more. When you tell 800,000 of your customers that they need to use 0W40, availability might become a problem as well as price. FS as far as I know is cheapest among 0W40 in Mobil1 line up. So, not only that “you” screwed me with engine, now “you” want me to use some expensive oil.
There is no money to be spend. FS was always R capable oil. GM just said: “ok let’s rubber stamp it without Mobil1 asking.” Bcs. again, availability.
They will still have a problem because the M1 FS bottles will not say DexosR if Mobil isn't cooperating or compensated for the change I would imagine. Not many people are gonna search that database to see what oils are actually DexosR. Every GM dealership stocks the Supercar (ESP) though.
edyvw
$50 site donor 2025
True. But a lot of people will just by 0W40. Mobil1 might stamp R on bottles in the future though.
I think this GM 6.2 thing is interesting on so many levels.
Despite having many overlaps and/or full coverages between some the requirements, small part of it could be the prestige of having your own name on it. No?
For example we have oil with BMW, MB, Porsche, VW, GM, Ford, Fiat, Renualt, Chrysler, etc. approvals ... some of which no one talks much about!
I had some oil with Yugo SL-01 approval. It did well in my lawnmower.
For example we have oil with BMW, MB, Porsche, VW, GM, Ford, Fiat, Renualt, Chrysler, etc. approvals ... some of which no one talks much about!
I had some oil with Yugo SL-01 approval. It did well in my lawnmower.
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Look at the design of the cars. The US grew up running lower octane fuels and NA engines. European cars are taxed based on many things including displacement. All those 3.0l cars are usually 2.98L or such, run turbos, higher compression, more power per cylinder, and thus have more stringent oil requirements. QS 5w30 vs Mobile 0w40 isn't apples to apples.
Why doesn't it?
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