Joe, the suggestion was to add a tax on gasoline. The greatest consumption of oil in this country, by far, is the procurement of gasoline for automobiles. If the tax was place on gasoline, only, I do not see how that would affect the cost of commodities in any way.

The intention of the tax is to motivate people to use less fuel, either by the use of mass transit, or by the use of more fuel efficient vehicles, or by the reduction of overall miles driven.
Again, each licensed driver would get a credit of $500, or $600 or whatever, against the amount spent for the additional tax. If you are moderately conservative, the tax will cost you nothing! If you must drive a Ford Expedition 20,000 miles per year, then you will pay for it.