Originally Posted by suburban_caveman

I have a 2012 Honda Fit and I believe it has a 10.6 gal fuel tank. I was wondering if anyone ever swapped for a larger capacity fuel tank? If anyone knows or has a best guess, how easy/difficult is this and how big do you think I could go and is this even possible?

Originally Posted by GolNat

Well the fuel tank is placed in such a way to allow the rear "magic" seats to perform their tricks. I doubt there is room to add a larger tank and if you did you have now compromised the safety testing that was done.

Best thing would be to increase your MPG. Have you heard of hypermiling?

Originally Posted by Fit Charlie

Yeah- if you can't stretch your tank, stretch what you can do with your tank. The Fit really rewards even minor hypermiling efforts.