I can do that too if I multiply by two.
Exactly why I don't calculate my mileage in the winter.
My VW gives me a readout as I drive in the multi-function display. It has real time, trip1 avg, trip2 avg. trip1 avg is for the duration that the car is on and it always resets itself. It's very easy for me to know if I got 35mpg going somewhere and only 25 on the way back. trip2 has to be manually reset, which I usually do at each oil change. Summer mileage I'm usually at 29-32mpg (I can get as much as 36mpg if I want to... But driving that slowly is boring). This winter I've been at 26-29 all inclusive (idling to warm up, winter gas, etc)
Which reminds me I need to find some small (read: <2.25" diameter mounting) LEDs that are bright enough for brake light usage. I can't seem to find anything other than some low output chinese junk.
My truck has all those fancy things too, but you have to reset them in order for them to work for each tankful. Honestly I would rather have an early 80s style truck dash with a mechanical gauge and no electronics.
Tank filled the same way I normally do, just checked the mileage online, 21.6mpg. That was running 60-65 most of the time, I left at 1am, diddnt hit traffic untill baltimore, and it was minor traffic.
I wonder if that has to do with tire size and the spedometer being off. The speedo is off just a tad in every car I've ever owned. It reads faster than you are actually going by about 2%.
Whelen makes something close but they want like $60-80 for the pair. I can't justify that if I risk the chance of busting one. Also the problem with most 2" lights is the mounting is well past the 2.25" I have to work with.
Interesting, I always figured it did. I know my fuel gauge is all kinds of goofy, I just use my trip odometer to tell me when to fill up now.
