Originally Posted by Gokhan
Originally Posted by Mad_Hatter
Originally Posted by Gokhan
Isn't SP/GF-6 aligned with the upcoming dexos1 Gen 3?
No, GF-6 aligns with D1G2. The article below, with quotes from Oronite's lead guy, addresses your question. Performance wise, D1G2 and GF-6 will be very similar but not exactly the same, with API still allowing a max volatility of 15% for example. There's some difference in testing as well but SP/GF-6 will incorporate the timing chain wear test and turbo deposits test for the first time IIRC. SP also incorporates SN+, which is something D1G2 has addressed for some time. D1 Gen3 will push the performance envelope further with tighter limits and an even lower volatility (12~12.5%). GM is targeting sometime in late Q1 early Q2 2021 for Gen3 licensing.
Nice thing is GM's desire to stay relevant in the standards setting arena (outside of ILSAC), as well as continue to make a buck on licensing, means better oil for us!
https://www.fuelsandlubes.com/fli-article/ilsac-gf-5-to-gf-6-bridging-the-gap/
I disagree.
Note that the article you linked is quite
outdated (published in August 2017). It merely speculated about the specs before either GF-6 or dexos1 Gen 3 was introduced. Now that they both have been introduced, a lot more is known, and the following article summarizes it:
GM releases dexos1 Gen 3 details
Quoting from this recent article:
"Speaking at the ICIS Pan-American Base Oils & Lubricants Conference in Jersey City, New Jersey, GM powertrain vehicle fluids technical specialist Khaled Zreik said GM made significant changes to align with ILSAC GF-6, the North American auto industry's specification scheduled for commercial launch in May. Gen 3 includes most GF-6 engine tests but also has additional requirements that could complicate work for oil marketers wanting to offer products that meet both specs."
It looks like we will have the GM dexos1 Gen 3 oils shortly after the ILSAC GF-6/API SP launch on May 1, 2020, if not simultaneously with it.
I think the proper way to look at this is that dexos1 takes a given ILSAC/API spec and builds upon it, by placing stricter test limits as well as placing a few extra tests. dexos1 Gen 1 was built on ILSAC GF-5/API SN and so was dexos1 Gen 2. API SN PLUS was a stopgap before API SP (ILSAC GF-6) to incorporate an LSPI test. Likewise dexos1 Gen 2 was also a stopgap before dexos1 Gen 3 to incorporate an LSPI test and a turbocharger test. Contrary to what was reported on BITOG, a timing-chain wear test was never included. Neither SN PLUS nor dexos1 Gen 2 are major revisions, other than taking care of the LSPI issue, which amounted to reducing the calcium detergent and replacing some of with a magnesium detergent.
Some oils, such as Mobil 1, did not even need a reformulation with dexos1 Gen 2, as they already had low calcium.
ILSAC GF-6/API SN is a major revision, and it introduces many (I think more than half a dozen) new engine tests. Unlike dexos1 Gen 2, dexos 1 Gen 3 will use the GF-6 engine tests. Of course, you are right that dexos1 Gen 3 is a stricter spec than GF-6/SP, as it has stricter test limits and a few additional tests.
Here are the dexos1 (2010), dexos1 Gen 2 (2015), and dexos2 (2009) specs (Excel file):
http://www.centerforqa.com/media/D1-Candidiate-Data-Package-2016-02-25.xls
The long story short, GF-6/SP and dexos1 Gen 3 both require
reformulation of existing oils. No existing oil that already has dexos1 Gen 2 will go unreformulated before it receives dexos1 Gen 3. This is unlike the dexos1 Gen 1 - Gen 2 transition. Likewise no existing oil that already has SN PLUS will go unreformulated before it receives SP/GF-6. There is a reason for this: When major spec revisions occur, additive companies update their additive packages.
With ILSAC GF-6/API SP and dexos1 Gen 3, we are seeing major oil-spec revisions of any sort for the first time in ten years, and this is a good reason for the oil enthusiasts to get excited.
I thought Pennzoil was bragging just a little while ago that their Platinum (et. al) oils would all qualify for GF-6 WITHOUT any reformulations.