Originally Posted by northstar1960
I go where i think i get good Fuel , Shell amco , Exon . some of the off brand gas stations have off brand gas also . saving a dollar or two isn't worth getting bad gas
I lived near an area where several of the major companies had a refinery. They would have different blends of detergents and other additives. The small companies and independents do not have a refinery. They called and got the best price from the majors and it would be delivered in a generic tanker ALMOST every time. So the less expensive may get Shell this time, BP next time, and another next.
At times one octane rating or another was low so whatever the most inventory was substituted, up or down. When was the last time a station was checked? If caught ~~ the delivery guy made a mistake. The number one rule is to buy where there is a high turnover.