Thread: FR-S Low MPG
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Old 12-12-2014, 12:19 PM   #15
extrashaky
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The fuel economy of this car corresponds directly to the kind of driving you do. I've never had a car that had such a wide range of mileage variability, just based on how I drove the car. You use a lot less gas if you keep it under 4000 RPM and out of the direct injection.

To give some examples, most of my driving is on interstates at 75 mph with maybe 10% city driving mixed in. I normally get about 31-32 mpg.

However, I had a trip a while back where I was stuck on back roads going 60 mph almost the entire time. My average jumped up to 34 mpg. At one point I reset the computer for a 60 mile leg down a flat two-lane road with a 55 mph speed limit. The computer calculated 37 mpg on that leg.

In contrast, I had a couple of weeks stuck at home, driving around the city. My mileage dropped down into the 20s. If I hot rod around town up above 4000 RPM, it drops even more.

If you push the bottom display button on the dash, you can get an instantaneous readout of your gas mileage that tells you your mpg as of that moment. It's certainly not 100% accurate, but if you just leave it on that readout and glance at it occasionally as you're driving, it can give you a pretty good idea of what kind of driving is sucking your gas and what isn't.
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