Anyone else having engine issues from apparent "bad gas"?

Start my truck yesterday morning and it starts shaking like I have 800hp under the hood. Then back fires. Engine light is on. I call price Leblanc and before I could finish the guy stopped me and explained the exact symptoms.... Says he has 13 cars/trucks in with the same problem. Apparently the gas is bad and or weak. Said the people had gas from a couple locations and brands... I can't take it in till next week. It runs fine once it heats up... Any ideas or anyone else experience this shite?