If you miss out, just walk a block to Mikeska's and pig out. Excellent as well, but not prone to sell-out like Mueller's. I borrowed a truck from a very nice fellow at Centex Flying Service for the 2 mile drive into Taylor. Picked up a couple quarts of Aeroshell 100 when I got back. The City of Taylor operates the airport.
Self serve fuel prices vary, according to the price they pay for each tanker.
Don't count on being able to get fuel. Although the City has used Centex's old office space as a Pilot's Lounge, they may not have things like oil for sale. They do have a DTN weather computer and a courtesy car to go to Mueller's BBQ . I've been to both Rudy Mikeska's and Mueller's BBQ locations. Mikeska's has been poor both times I went.