Stuff I learned today...
More than 50% of the oil sold is never accounted for by the EPA. Apparently those oil change places need to dispose of the oil appropriately and this involves telling our government when this happens.
The technology for engines that do well with 15,000 miles between oil changes has been used in Europe for a decade
Ford Motor Company pays through the nose every year for failure to meet EPA standards.
I hate the fact that our country is largely clueless about the environment. This is the only world we got folks. Treat it well.