@lovejoy,
Those are good points. Not to niggle, but you do you know that gas at $10.00 per gallon holds to that price due to taxes, don't you? Also, prices around here are running around $3.60/gal. Still, it's a good point. A higher price would lower consumption, help with balance of payments, reduce air pollution, and do more to stimulate production of fuel efficient vehicles than all the subsidies that come out of Washington.
Might be best to leave taxes on heavy Diesel vehicles alone, just to keep the economy moving, and that wouldn't be difficult. All the interstate trucking companies are turning in an IFTA report every quarter. The same report could be a basis for a refund of taxes on heavy trucking.