Originally Posted By: ka9mnx
wemay said:Another plausible explanation is what's available on store shelves. Cafe regulated oils may not be as easy to find. I don't know, i live here not there.
I think you nailed it. I think the manufacturers look to what oil is available in the country they are selling their vehicles and pick the best/closest choice.
Except in locales where EPA requires them to make available and unequivocally recommend the exact oil that they used during the fuel economy tests for CAFE purposes.