How do you reset the average mileage display?
Ran through our first tank on a 2010 CX-9 Touring FWD and came up w/ 20.1 (Fuelly) w/ 50/50 driving. We're working on tank #2 so we'll see how bad it gets with about 70/30. Coming from a CX-7 personal vehicle that got 17mpg. My CX-5 is still getting 26mpg... makes me happy.
I remember an Edmunds story from a few years ago that measured efficiency impact of many different factors. The biggest driver of efficiency BY FAR was driving style. Light on the gas when accelerating. Coast when coming up to traffic lights, stop signs, etc.
Wow, something must be wrong or your usage is very far from normal. Do you do a lot of idling? Do you let the car warm up by idling in the morning or do you start up and start driving? How are you measuring fuel economy?
If an engine is designed for 87, using 91 fuel decreases MPG.
The energy content in 91 fuel is less than that of 87 per volume.
This time i put 14.9 gallons in, however it wasn't topped off and i probably could have put in another 2-3 gallons. Ill know next tank when i fill it to the top and then see after a full tank. I do not let it idle before i drive it. I coast to the stop signs and lights.
It was 80 bucks worth at 14.9 gallons. It is 1.42 a liter and one gallon is 3.78 liters. I know full fillup is closer to 100 bucks a tank.