Hi! I'm new to all this and thought I would make a thread on my MPG I have a 2005 Honda Accord Coupe Ex 4 Cyl and get 20MPG about 75% Interstate and 30% city I do about 70-75 mph on the interstate my car has 48,100 miles and I think I should average better I get 30MPG on my 4 Cyl on my 09 Altima any ideas? My car is always serviced at Honda due to the warranty. What do you guys with a 4 cyl average? I get 270 miles out of a tank and it fills up with about 13.247 gallons according to the pump and I use regular 87 gas.