Oil compatibility
Instructor
Joined: Mar 2022
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From: Poland
2022 C7 of the Year Finalist - Unmodified
Thanks for finding that! Now I know where to get it - although it looks like it has to be purchased. I see a Feb 2021 version of it for dexos R, and another Feb 2023 version, is the current "active" version. Interesting that there are two versions. I did not buy it (yet). But, I wonder if there were any changes to the spec between the 2021 and 2023 versions?
So, on the HTHS, looks like no upper limit on the page you posted - just a lower one 3.5.
So, on the HTHS, looks like no upper limit on the page you posted - just a lower one 3.5.
GMW18299 Release and Revisions
This standard was originated in June 2020.
It was first approved by the Materials - Fuels, Fluids and Lubricants GSSLT in January 2021.
It was first published in February 2021.
Issue - Publication Date - Description (Organization)
1 - FEB 2021 - Initial publication.
2 - FEB 2023 - Updated GM stochastic pre-ignition, ASTM Sequence IX stochastic pre-ignition, and GM oil efficiency evaluation test limits. (Materials - Fuels, Fluids and Lubricants GSSLT)
Yes
only minimum HTHS Viscosity @ 150 °C ≥3.5 (CEC L-36-A-90, ASTM D4741, ASTM D4683)
for the following standards
dexos 2 (GMW16177 version 08-2010, 04-2011, 11-2016, 11-2022) - SAE Grades 0W-30, 5W-30, 0W-40, 5W-40
dexos R (GMW18299 version 02-2021, 02-2023) - SAE Grade XW-40 (0W-40, 5W-40)
exactly same requirements are in SAE J300 Viscosity Grades For Engine Oils and ACEA C3 Engine Oils
minimum HTHS Viscosity (mPa.s) @ 150°C ≥3.5 for SAE 40 Grades (ASTM D4683, ASTM D4741, ASTM 4851 or CEC L-36-90)
