Unless you're restarting the pump multiple times after the auto-shutoff this is a station pump issue. To get more accurate mpg measurements I am in the habit of slo-filling toward the end and a single click more after the first auto-shutoff. The additional fuel can be anywhere from under a tenth to almost a half-gallon of fuel. Only once or twice in 55 years have I had an overflow. They were at unfamiliar pumps, one was a fast flowing pump that ran over without ever stopping, the other was when I raised the nozzle slightly before I tried to "top it off". Never trust the auto shut-off. I've seen several times where "gallons" of gas/diesel flowed onto the ground from an unattended pump.The past 2 fill-ups have resulted in gas coming back out of the spout when the pump auto stop kicked in. The gas was collected back thru the small hole below the gas tank opening.
Anyone else having issues with fill-ups?
Don't think we know. Probably a mix of three factors: 1) the pump and variability from one to another in flow rate and shutoff sensitivity, 2) the car and its plumbing and tank geometry and vapor recovery system, and 3) the technique of the person filling it.So the overflow problem is due to the gas stations instead of a car problem?