[SentraSE-R]

Good job, Matt, but you need to set the bar much higher. I drive a Scion xB with higher cD, much larger cDA, and shorter gearing (OEM gearing forces my engine to run at 3100 rpm @ 60 mph). We share the same engine, Toyota's 1NZ-FE. Admittedly, I have a slightly larger 11.9 gallon gas tank v. the Yaris' 11.1 gal. tank, but I'd choose to drive your car rather than mine to achieve your goals.

Here's how high the bar is for you Tercel/Echo/Yaris/xA/xB people. I have 21 of 121 tanks >500 miles, including 3 tanks >600 miles. Two of those tanks were over 1000 km (621.37 miles). I'm not trying for maximum distance tanks, either, as 15 of my 121 tanks are <200 mile tanks. I'm quite willing to top off my tank in Nevada or Arizona or Georgia with cheap gas before crossing the state line to higher prices. And I do a lot of cross-country driving where I don't want to be down to within a gallon of the low fuel light in unfamiliar territory.

I'm running 76% over EPA, for more than 45,000 miles.

I have 49 of 121 tanks >50 mpg, including 4 tanks >60 mpg.

Good luck I'm not trying to intimidate you. Take the higher bars as challenge and inspiration. If I can do it in my boxy xB, you guys in your streamlined Yarises should mop the floor with my rolling hay bale.