New mobil 1 0w40 viscosity
- Thread starter JonnyAbs
- Start date
And nobody has a gun to anyone's head to open them up and chime in if it doesn't interest them.
edyvw
$50 site donor 2025
Absolutely. Same goes for responses.
It’s tempting but I don’t like the add pack of Castrol. No moly, low boron, a little Ti that we never really understood how effective it is, and SN detergent package. Plus no 5 Qt/5L jugs.
I knew it had changed and was SP. However, when I bought a bunch this summer, it was actually hard to find the US data sheet on mobil.com. And when I pulled up the variations that were available like Mexico, Singapore, etc, they said either 12.9 or 13.2 as the cst @ 100c.
This 13.8 cst on the datasheet is pretty new. Can't be more than a few months old.
Also I had a unique experience with the user you referenced. He stuck in my mind because he found it necessary to argue with me for calling hydrocracked group III oils "highly refined." It was a bizarre exchange to say the least.
edyvw
$50 site donor 2025
The SP PDS is available for some time. Each PDS has a date and it is not uncommon for companies to update them. That might be a reason why you saw 12.9 and 13.2. Also, different markets might have different versions due to the blending process at a facility that does it in that market.
XOM could not roll out nor did it make sense to roll out SP in the whole world at once. Different markets have different logistical challenges.
Yeah I get that different markets would have different variations. The US version of the pdf was not available a couple months ago when I checked. I was slightly frustrated at this. I looked for a date in the pds and don't see it. I see a trademark for 3/23 but that's different. Even if it was written in March, if surely wasn't available on their website then.
edyvw
$50 site donor 2025
Actually, it was available a couple of months ago. We discussed it in March:
https://bobistheoilguy.com/forums/threads/mobil-1-fs-0w40-has-bmw-longlife-01-again.366895/
Was the viscosity change discussed then? I feel like a broken record but I am pretty certain the 13.8 was not listed then.
It was. In which thread I don’t know, but it definitely was. The KV100 was on the first pdf that was found. No big deal though, I don’t think admonishing anyone is productive.
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edyvw
$50 site donor 2025
New SP version with this viscosity reintroduced LL01.
I browsed the other long thread that's been going since March and no mention of viscosity change unless I missed it. Either way its like finding a needle in a haystack so I don't really regret starting this thread as a few other people didn't know either. Many people used this as an alternative to 5w30 since it's on the thinner end of 40 weight oils. This might change that for some people, including me. I'll probably go back to 5w30.
edyvw
$50 site donor 2025
The SP moved viscosity to 13.8. It is not discussed as for European oil users approvals are what matters.
I remember mentioning somewhere how KV100 and HTHS are not that good as before (you want lower KV100 and higher HTHS, not other way around).
OVERKILL
$100 Site Donor 2021
It's not inherently "good" or "bad", it's just an artifact of the base oil, base oil visc and VII combination. The Ravenol SSL is 13.8cSt as well, with an HTHS of 3.7cP and KV40 of 78.1, so the two oils basically have identical VI's and KV specs which one might be inclined to extrapolate to them both having the same HTHS.
Yep. The only thing it really tells us is the oil has a lot of VII. Not surprising. Plus it’s like 1 cSt thicker than it used to be. Oh no, not a whole cSt. Well within Blackstone’s margin of error
. This formula doesn’t have great HTFS for those who care about that, but it didn’t for the SN version either.
This is the only thing that matters, period. Also, a “slight” increase in kinematic viscosity is pure statistical noise, as a 5* difference in oil temp can turn a 40 into a 30. This oil is most likely the pinnacle of shelf stock; its Euro certs are numerous and high quality. I would have zero concerns using this oil in anything I own…
OVERKILL
$100 Site Donor 2021
And "a lot" is of course relative. Blending guide examples with a similar VI are around 9-12%, around the same as a 5W-30.Yep. The only thing it really tells us is the oil has a lot of VII. Not surprising. Plus it’s like 1 cSt thicker than it used to be. Oh no, not a whole cSt. Well within Blackstone’s margin of error
Do you understand that kinematic viscosity is almost an afterthought? It’s an artifact of base oil choice and VIIs. If you’re worried about how thick an oil really is, the HTHS should be what you’re comparing, not viscosity.
Let’s take a step back: if you’re using this 40 grade as a thickness upgrade over a 30 grade, there is essentially zero difference between the old and new viscosities. Your engine will never know the difference.
edyvw
$50 site donor 2025
I am aware, and it will be fine, especially for bang for a buck, but then, Castrol Edge 0W30 and HTHS 3.58.
I mean we had oils with KV100 of 14.2 and HTHS 3.7, yet we all preferred M1 0W40.
