Not sure if this is case. Most of time, engine is off when idling or stopping (while it runs on Hybrid battery). If I just re-fueled the car and hybrid battery is low, engine kicks in and I could see MPG drops during idling or stopping.I guess it didn't count the time when you idling the car or stopping at red light?
I am not looking for exact matches, but kind of feel it is off too much. On my 02 MDX and 09 TL, MPG is mostly off by 0.1 ~ 0.4 MPG. Never off by this much.I have never heard of a car where the actual mpg matches the calculation in the car. It seems pretty close to me. The car almost always shows higher. You are going to have to live with it.
As I said,I have never seen anything that close. Too many variables. When the pump shuts off. Topping off,which you shouldn’t do. Pump shut offs vary. I would say that your other cars were an exception.I am not looking for exact matches, but kind of feel it is off too much. On my 02 MDX and 09 TL, MPG is mostly off by 0.1 ~ 0.4 MPG. Never off by this much.
I agree with you. By the way gage is not spelled that way. It is gauge.The thing is only a guess at best. Same for the temp gage, the fuel gage and the speedo. There is always a built in error on every gage in a car. Makes no difference how expensive or cheap the car is. I use the readings as a gage only. I use a smarp phone app to track the actual fuel milage, so who cares?