Here is the chart of the average cost of gasoline in Texas over the years. You can see in 2002. the price dipped to an average of $1. And in the rural areas it was MUCH less.
https://www.eia.gov/dnav/pet/hist/LeafHandler.ashx?n=PET&s=EMM_EPMRU_PTE_STX_DPG&f=W
Are those dollars inflation adjusted?
If your recollection is correct, then the data at the link is not inflation adjusted.