Member Bill10562 is showing a 2020 Honda Ridgeline with fill-ups dating back to 2017. Fuelly is using this incorrect data in its calculation. I've tried contacting him, but got no response. I've also reported the page a couple of times.
Looks like another user confused how fuelly works, I'm seeing a worse tank of 1.58 MPG, which is obviously bogus. Unfortunately it's pretty common, if the report button isn't working, I'm not sure what else to suggest to be honest.
This guy has put his diesel car in amongst the petrols, skewing the stats for the car. I'm not sure why it's so difficult for people to read and choose the correct things, but it clearly is.