One in four new vehicles average less than 20 mpg in 2014.

+1

Yep, I like this break down

THe public has dropped from 24% to less than 9% of the worst guzzlers. I can believe that around 5% need a sub 18 mpg work truck or suv, so we are getting rid of the worst fast.

US sulfur regulations have little to do with gasoline for export. The US refiners exported ultra low sulfur diesel to europe before it was required here. US refiners can easily lower gasoline sulfur for export from the gulf states refineries but it is not worhtwile to do it to europe. The US used to export diesel to europe, and import gasoline from europe. This allowed european and us to make the lowest cost split. Now with US demand for oil going down, the refineries on the gulf coast have excess capacity so they make extra diesel to export profitably to europe and have extra gasoline to export to central and south america. Its Europes regulation that is driving these excess diesel exports (european refineries aren't getting upgraded to make diesel out of less expensive but higher ghg producing oils). Brazil may build refining capacity to export diesel to europe as well, which could push this trade to be less profitable.

Lower sulfur and higher octane would help automakers meet 2025 cafe standards, epa is already talking about rolling those back. Low gas prices may make those hard to meet.