Using a lot of gas but no smell or leak
2010 Volkswagen Jetta SE. Here's what happened. I had to someplace. I had a little over a quarter tank of gas. I stopped at a gas station and got $10 more of plus grade. The trip up (it's approx a 130 mi. round trip) no problem gas burned at a normal rate. I picked up about 100 lbs. of items, no more than a passenger. On the way back suddenly I was watching the gas guage drop like a rock. Pulled over, could smell no gas near the tank, or under the hood. I barely made it home. Could they have put something other than gas in my car?