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EPA was started by Nixon, let's all remember that.
I casually follow the big rig industry, and everything to do with it. Even with cheap diesel we're seeing these days, the #1 cost of operating a truck is still the fuel. I kind-of doubt that even if Trump removes fuel economy requirements or reduction of sulfur emissions, that truck manufacturers will suddenly go back to making the less sophisticated engines of the past. Maybe the sulfur stuff, I could see them dumping SCR if it wasn't required, but every time I open Transport Topics or Heavy Duty Trucking I see lots of discussion of aeromods and gear ratios and transmissions and weight reduction. It looks like fuel efficiency is still important to fleets and owner-operators.
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