Also, my husband has done a lot of work with chevron, one of the most expensive gas companies, they SELL their gas to places like arco and some of the “cheaper” gas stations. ITS THE SAME GAS. Some of those sketchy gas stations do add stuff to their gas to make it cheaper, so don’t go to those places but arco is fine. Some of the more expensive places add things to their gas to make it “nicer” but the base gas is the same