[thayne]

First of all, the typical person does not fill a car with gas nearly as often as you use electricity. Secondly, if I had to choose to use one of those gas stations exclusively, I might choose the one with a fixed rate, because:

1. It would make it easier to predict how much I would need to pay for gas each month, and simplify budgeting.

2. I don't need to worry about keeping track of the current price of gas

3. Depending on how my driving schedule matches the variance in prices, it may actually be cheaper for me.