I have a 2012 EX coupe w/ Nav. I remember when I first got this car (new, in 2013), I could go 300+ miles on one full tank/fill up. Lately I average about 260/270 miles on one full tank of gas (regular, unleaded). Obviously there is some fluctuation (better milage on highway, worse when I'm doing a lot of city driving, etc). My question is, has anyone else noticed that their gas milage has decreased over the years? Could there be an underlying issue, causing my gas milage to be worse (IE, could the electronic gauge be faulty, etc?)? What is the average amount of miles you can drive on a full tank, before having to refuel? Thanks in advance.