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Old 07-31-2017, 07:59 AM   #4 (permalink)
JRMichler
Master EcoModder
 
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Join Date: Feb 2011
Location: Phillips, WI
Posts: 981

Nameless - '06 GMC Canyon
90 day: 35.72 mpg (US)
Thanks: 188
Thanked 412 Times in 264 Posts
I ran a test before I took the time to put in my kill switch. Got the truck up to speed, shut of the engine, pumped the brakes until the vacuum was gone, then stopped using only the service brakes. On a downhill grade. Without the emergency brake, and without engine braking.

When I knew that I could stop the truck using only the service brakes without vacuum assist, then I put in the kill switch. A properly adjusted seat and a strong right leg are essential for this.
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The vacuum gauge plus wheel covers helped increase summer 2015 mileage to 38.5 MPG, while summer 2016 mileage was 38.6 MPG without the wheel covers. Drove 33,021 miles 2016-2018 at 35.00 MPG.
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