I'm not sure if the guage looked any different. I don't drive the car much other than to work, so every week is very much the same. I don't remember exactly when the switch happened, I'm thinking maybe October. I will fill up after about 320 miles each week, and put in 13-14 gallons. Every week, without fail, I will put in between .8 and 1 gallon more than the DIC said I used. The DIC also would show between 24 and 24.5 MPG every week, but the actual MPG was 23-23.5. Well when I filled up Thursday, I put in 13.3 gallons, and the DIC said I used 13.2. And the MPG on the DIC was 25.0, and I calculated 24.9. I also always get gas at the same station every week. It will be interesting to see if this happens again in the fall. If so I'll have to get gas somewhere else and see if the same thing happens.
2003 Black SLE-Stock
2000 Mercury Mountaineer
1968 Oldsmobile Cutlass Convertible-455 cubic inches of muscle