Texas · The pump price is not the premium
There is no cheapest gas brand in Texas, and fuel is not part of the auto policy.
Pump prices move by neighborhood, wholesale cost, tax, and the station across the street. A chain that is low on one corner can be ordinary a mile away, the same afternoon. This page will not rank retailers. Compare the price on your route today. The insurance point is separate: gasoline, tires, and oil changes are costs you pay because you drive. They are not claims.
A commute you lengthen to chase a cheaper pump is still miles. The policy does not reimburse them. After a crash, the path is the claim, not the receipt from the station: what a Texas auto claim looks like. What the policy is: car insurance in Texas and Texas auto.