How many of you guys are running this oil? From the VOAs, it looks to be one of the best 40ws on the market. The GTR guys in my club almost exclusively run the stuff.
It's interesting that it's recommend for the GT-R application by AMSOIL, since the GT-R oil (M1 FS 0W-40) is a full-SAPS Euro oil with higher levels of phosphorous (AW additive).How many of you guys are running this oil? From the VOAs, it looks to be one of the best 40ws on the market. The GTR guys in my club almost exclusively run the stuff.
These guys have run the Euro 0w40FS, and the oil temps weren't much different than the Amsoil. The Amsoil does have a large amount of Boron, which I assume is some type of boron ester.It's interesting that it's recommend for the GT-R application by AMSOIL, since the GT-R oil (M1 FS 0W-40) is a full-SAPS Euro oil with higher levels of phosphorous (AW additive).
AMSOIL 0W-40 has ~750ppm phosphorous:
(2) 2015 Ford Fusion, 2.0L Ecoboost, 12.5K, Amsoil SSO 0w-40 | Bob Is The Oil Guy
While M1 FS 0W-40 has 930ppm, as noted in the Product Guide and verified by VOA:
(2) Mobil 1 0w-40 SP VOA | Bob Is The Oil Guy
I wouldn't expect the oil temps to be different, the oils are similar in viscosity and I assume the car has an oil cooler.These guys have run the Euro 0w40FS, and the oil temps weren't much different than the Amsoil. The Amsoil does have a large amount of Boron, which I assume is some type of boron ester.
It looks like Boron was slashed in a recent formulation change, probably with the SN+ or SP upgrade, like the Mobil product, which saw a similar reduction.Here is a VOA from 2018. I don't think they've changed the formulation since then, but additive levels may have a bit over that time period.
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I think you're right. It does look that way.It looks like Boron was slashed in a recent formulation change, probably with the SN+ or SP upgrade, like the Mobil product, which saw a similar reduction.
Now we have more questions than answers, lol, because the 2023 UAO says the oil was SN+, so perhaps he had old stock?Found one
Amsoil Signature Series 0W-40, API SP, New Oil Reference.
Here is the next oil I will be trying. The last run of Amsoil's European 0W-40 for 11k performed very well considering the GDI high fuel dilution. The TBN for this oil is 12.5, and Viscosity Index is 184. Attached is the spec sheet.bobistheoilguy.com
Right lol. That could be. Good question.Now we have more questions than answers, lol, because the 2023 UAO says the oil was SN+, so perhaps he had old stock?