I've been tracking how my fuel economy is on my 2010 mazda 3 and just wanted to know does anyone feel that their Mazda's fuel economy is kind of lackluster I have a 2010 Mazda 3 2L base model auto. A full tank is roughly 50L but I get like 330-360km for a full tank and I end up spending $200 a month on gas. Most of my mileage is on the city streets but I don't typically drive much or far probably driving 1000 km a month

 

Either you have a lead foot, or most likely you need a tune up and most likely a new A/F sensor ( upstream O2 sensor)

 

I averaged 7.8ltrs / 100kms or about 500km a tank in my 2012 2.0 Mazda 3.

 

not sure how anyone could say your MPG is low or high? You are leaving out way to much information to make any real assessment ? One example is if you do short city/town driving and the colder months the engine may not be getting completely warmed up. If it is slow engine speeds stop and go naturally MPG will be lower. Without seeing and averaging instant MPG over several days and comparing several days it not an unreasonable mpg that your getting based on the limited information you are giving? I have not even mentioned what the fuel mixture changes in your area are either?