I've been averaging 31-32mpg 60% hwy / 40% city-suburban - A/C 1/2 the time. I'm not a hard core hypermiler but I avoid hard accleration if I can, adjust my speed and coast to stops, and shift to the highest gear possible without lugging the engine. It's just me in the car. I got 34mpg 100% hwy. When I had my Dad and a trunk and back seat full of junk on the trip from PA to NC, I still got 31mpg.I'm getting 26 mpg suburban with the 2.5 4 cylinder and automatic trans with 9000 mi. on car. I haven't reset the mpg setting since about 1500 miles, so this is a pretty good estimation of what you can expect if you drive conservatively. Otherwise you're probably looking at 23-24.[/b]
First tank of gas on 2009 2.5L, 6 sp manual. Driving was 20% / 80% - Suburban / Highway, AC on 20%. Varied driving style between very conservative to slightly "spirited" (was trying to get the feel of the car). A few times, I forgot there was a 6th gear.
28.2 MPG (US). This was manually computed with a topped-off tank.
FYI: I also have a 2007, 2.3L, 5M with 30,000 (US) miles driven the same as above. I've logged every mileage since day one. Average is 30.5 MPG +/- 1.7. Winter mileage is always the low end and it seems to love warm weather. I keep tires about 8-10% higher than rated door-jam sticker. I always accelerate smoothly and get into the highest gear possible without under-revving (lugging) the engine. As traffic behind me permits, I coast into stops either dead-stick or in the last gear it was in, depending on the desired deceleration.
Once I get used to the new 2009, I think it will do just as well as the 2007. -Not bad considering it's bigger, heavier and 20 more horsepower.
I really like this car and if it treats me as well as my 2007, I'll stick with Mazdas for the foreseeable future (Maybe 26 years like I did with Toyotas).