[SentraSE-R]

Originally Posted by Frank Lee

We need to watch how that toothy green box out in Cali does with it's new shoes...

I'll probably start a new thread when I do my ABA testing, because it gets complicated fast. I drove 800 miles last weekend. New tires calibrated 9.9% lower than the odometer, per my GPS. I did a couple of 60 mile, and one 80 mile, leg(s) for calibration. My first tank was mixed - ~40 miles on the stock tires, 100 miles on the new tires uncalibrated, 170 miles on new tires calibrated to 5.5%, and 180 miles on new tires calibrated to 9.9%. I had to rely on the Ultragauge's distance traveled, as I accidentally reset the car's trip odometer. Bottom line, a really questionable 53.7 mpg for 514 miles, my best highway trip in my fuel log.

The new tires, however, are not 9.9% taller. They're only 5.31% taller than stock, and roll 5.605% less distance. That means my baseline with the stockers is flawed. I never calibrated distance with the stockers. When I do, I expect there'll be a 4.3% odometer error. That means instead of averaging 47.1 mpg for 20,000 miles, I actually averaged 49.3 mpg, and my impressions of what is normal are not normal.

My second tank was a short one, just 174.2 miles on 3.653 gal = 47.7 mpg. That mpg falls inside the normal mpg I got with the stockers on highway trips, adjusting for the 4.3% odometer error.

Right now, it looks like the new tires will be close to the stockers, despite weighing more and having worse aerodynamic properties.