There apparently isn't any validation currently for logging entries since it allows 133 MPG to be entered for a vehicle which is absolutely ridiculous.
http://www.fuelly.com/car/acura/mdx/2003/moshez/176549
C'mon, this can't be that hard, put a check on entries that doesn't allow > 40 MPG or if you can find anyone there that has a brain at all, you could even use the AVG MPG For the vehicle and not allow an entry greater than 50% higher than the avg mpg for the year and model they are logging an entry for. If you need me to explain that to you, if the aVG MPG for the vehicle is 20 MPG, then a max of 30 is the highest entry allowed since nobody is going to get more than 50% higher than the AVG MPG for a vehicle no matter how carefully they drive and it WOULD NOT ALLOW AN ENTRY OF 133 MPG WHICH IS COMPLETELY RIDICULOUS!!!!!!!!!!!!
I report these pages every time I used Fuelly so there is at least one error pretty much for every vehicle I look at. PLEASE ADD SOME VALIDATION FOR THE ENTRIES PEOPLE ARE MAKING TO KEEP THESE CRAZY ENTRIES FROM BEING MADE AND SCREWING UP THE AVG MPG FOR THE VEHICLES WHEN THEY ARE!!!!