Originally Posted by Brigadier
Originally Posted by Virtus_Probi
Originally Posted by Brigadier
Dexos2 is NOT LSPI compliant. Gen2 will be.
I started a thread on this topic some time ago...both dexos1 Gen 2 and dexos2 include LSPI mitigation tests.
https://www.fuelsandlubes.com/fli-article/the-new-gm-dexos2-its-complicated/
Read very, very carefully:
Notice it says "lubricants for GM's
NEW dexos2 specification, which covers diesel engines,
WILL HAVE TO pass an LSPI test..."
"Fortunately for lubricant formulators, the dexos2 specification is set so that there will be new viscosity classes. The old viscosity grades will remain for backward compatibility and will not need, for instance, to demonstrate
LSPI performance. The new viscosity grades, such as SAE xW-20, will have to meet LSPI and other requirements."
And there are no 20 weights listed here:
https://www.gmdexos.com/owner/brands/dexos2/index.html
^^ So it seems a dexos2 Gen2 is on it's way....
"Elswhere in the world, GM requires dexos1 for gasoline engines and dexos2 for diesel engines."
^^ dexos2 Gen1 is already in play. Given there is no date on this article, the time reference is impossible to tell.
"For the
NEW dexos2 specification, due out this year...."
d2G2....this is the one with the LSPI test.
Well, I posted about this in March 2018 and the article references a conference that occurred in April in the past tense, so I think it must be from 2017.
The whole thing is pretty darned confusing (it mentions a first generation dexos2 launching in 2000, surely not possible as dexos1 oils did not show up in GM vehicles until MY2011), but I have to agree that a careful read indicates that dexos2 is NOT a guarantee of an oil passing an LSPI test. The whole thing about older grades not needing to pass LSPI testing whenever the "new" standard is out is truly disconcerting!
My apologies to everybody for spreading misinformation!
Thanks to Brigadier for calling me out on this, I didn't read the article critically enough to truthfully say what I have been spreading on here about dexos2 and LSPI.
I have yet to see the term dexos2 Gen 2, though, and we were hearing about dexos1 Gen 2 for years before the oils showed up on the shelves.