the official dexos1 list: http://www.centerforqa.com/gm/dexos1-brands
You can see there is a lot of brands on it now. And, dexos1 certification means an oil has officially passed a more rigorous set of tests compared to SN-GF5, a good thing.
Its been stated in several places on the internet that GM's fee for the right to be on the dexos1 and dexos2 lists is 9 cents per quart. I assume that's correct; someone find a better reference if you can.
Lets say 1/6 of all the oil sold on the market (Walmart, Autozone, other retailers, oil change stations, dealerships, etc.) are dexos1 official. California alone consumes 600,000,000 quarts per year. See http://www.calrecycle.ca.gov/usedoil/RateInfo/default.htm#Table1 .....Assume the rest of the world consumes 5 times that much to make 3 billion quarts per year total for the planet, so that makes 500 million quarts dexos1 and dexos2 oils per year.
That means GM takes in $45 million dollars per year in dexos licensing fees.
Since the oil makers pay for the certification tests, the only expense GM has is running their abysmal website for dexos and doing basic research on which ACEA or SN or GF-5 tests to use for dexos.
dexos is defined by ASTM, ISO, ACEA, ILSAC tests on oils, as seen in https://www.aftonchemical.com/Lists/Brochure/Attachments/40/Specification_Handbook.pdf do a search on the keyword dexos to find the list of tests to do. GM is recovering their engineering knowledge I guess on which tests to pick, something bitogers could probably do for free....ha, ha.
You can see there is a lot of brands on it now. And, dexos1 certification means an oil has officially passed a more rigorous set of tests compared to SN-GF5, a good thing.
Its been stated in several places on the internet that GM's fee for the right to be on the dexos1 and dexos2 lists is 9 cents per quart. I assume that's correct; someone find a better reference if you can.
Lets say 1/6 of all the oil sold on the market (Walmart, Autozone, other retailers, oil change stations, dealerships, etc.) are dexos1 official. California alone consumes 600,000,000 quarts per year. See http://www.calrecycle.ca.gov/usedoil/RateInfo/default.htm#Table1 .....Assume the rest of the world consumes 5 times that much to make 3 billion quarts per year total for the planet, so that makes 500 million quarts dexos1 and dexos2 oils per year.
That means GM takes in $45 million dollars per year in dexos licensing fees.
Since the oil makers pay for the certification tests, the only expense GM has is running their abysmal website for dexos and doing basic research on which ACEA or SN or GF-5 tests to use for dexos.
dexos is defined by ASTM, ISO, ACEA, ILSAC tests on oils, as seen in https://www.aftonchemical.com/Lists/Brochure/Attachments/40/Specification_Handbook.pdf do a search on the keyword dexos to find the list of tests to do. GM is recovering their engineering knowledge I guess on which tests to pick, something bitogers could probably do for free....ha, ha.
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