Tonight I set off for a meeting 20 miles up the motorway with DTE showing 29 to empty. I planned to fill up before returning home. I’ve only been driving around town lately and the fuel consumption was showing 19.3 mpg.
As I drove along slowly in fairly heavy traffic the DTE went up to 32 mpg as it would normally do. The fuel gauge was in the middle of the red section. We proceeded in this way for a few miles. However, the next time I looked at the DTE it was showing 61 miles to empty and the fuel gauge had jump to around a quarter full st the top of the red section. The fuel consumption was showing the same reading as before, but that may not be significant as it will have been a while since it was reset.
I don’t plan to believe this. So I’m wondering what caused it. I remember something like this happening on my old Aero saloon on a long trip when I was starting to look for a fuel stop. DTE jumped from about 40 to around 120 then.
Any thoughts?