First time posting, have no car knowledge. We filled my wife's 2017 Dodge Durango up at a new gas station, shortly after that we noticed sluggish acceleration and trouble going off stops. We took it to a jiffy lube, got the oil changed (it needed it anyway) and had them do a fuel system cleaning.
We also picked up some octane booster.
This morning when we started it, black smoke came out and then thin white smoke. I have it idling to burn off the bad gas (guessing). While idling there is no white smoke, when I rev it every 15-20min thin white smoke comes out and then goes away. I've kept an eye on the engine coolant and it hasn't dropped any. There are black flakes on the driveway where the exhaust is.
I read several horror stories that it could be a blown gasket or something. Should I be worried or is it just the car burning through the bad gas and other things we put in it?