The state might not be openly promoting EV use, but you can bet they aren't going to be shy about holding their hand out to collect those 'road taxes' from other ways if they cannot get it from gas/fuel sales.Actually more to it than meets the eye. Is it the State charging the extra $100, or the Federal Government? Oklahoma gets 19 cents per gallon of diesel or gas. EV's in general are heavier than gasoline cars as well. The state of Oklahoma is not promoting EV's as far as I know, but the federal government is.