or perhaps that you should use the tires that OEM's are now putting on cars to milk out like .5% more MPG. you know, the ones that cost more than most performance tires, wear out about as fast, and have next to no grip?
At least that's what it sounds like going by how they say aftermarket parts will be illegal, Trucks have to be more aerodynamic (to reduce emissions), and the tires you buy have to reduce emissions as well.