[Jim W]

I have a web site that checks diesel fuel prices and road taxes, I have found that there is no difference in most states. In IL for example all diesel for on-road use has the same fuel tax regardless of were you fill-up for diesel. I found this to be true in OH, VA, NC, and TN this year. IN was the only state that required a tax number for truckers and I could not fill up at the Loves station when I was at in the truck islands. The station was design to allow pick-ups and 5er or real long travel trailers to fill -up in the normal service islands.
I would check out a publication called The RVers Friend, this list by state the fuel tax on diesel fuel and gasoline and I believe there is no differenitation for light duty vehicles and long haul trucks.
I will pay for the added tax if it means I do not have to worry about cars and small fill-up islands. When trying to get my truck and 5er in and out of fueling stations.
Jim
P.S. AL fuel tax for Gasoline and Diesel is $0.08.