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Old 03-17-2019, 03:07 PM   #172 (permalink)
mpg_numbers_guy
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Join Date: Feb 2018
Location: VA
Posts: 1,372

Toby - '13 Toyota Prius C
Team Toyota
90 day: 63.99 mpg (US)

Daz - '15 Mazda 3 iTouring w/ Tech Package
Team Mazda
90 day: 38.2 mpg (US)
Thanks: 324
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Tried 80 PSI in my tires for the trip down to college post-spring break instead of my normal 60 PSI. Insight performed amazing - 85.3 MPG over 705.2 miles. 88.3 MPG for the first leg, and 82.1 MPG over the last leg that's mostly mountains. Was averaging ~10 MPG better going up the mountains, ~15 MPG better at speeds <50 MPH, and ~5 MPG better at speeds >50 MPH. Of course the IMA is still disabled for better highway fuel economy.

For comparison:
First trip to college with the car: 78.2 MPG
Spring break trip home: 78.4 MPG

Only fuel economy modifications since last trip were a 3' x 3' underbody panel, 80 PSI in the tires, and a warm air intake that actually works now.

Temp varied between 31 and 49 degrees F. Cruising speed varied between 40 MPH (up the steepest mountains) and [insert incriminating speed] MPH on the downhills. Trip time was the same as the other trips.
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2013 Toyota Prius C 2 (my car)


2015 Mazda 3 iTouring Hatchback w/ Tech Package (wife's car)

Last edited by mpg_numbers_guy; 03-17-2019 at 04:00 PM..
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