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Old 09-21-2013, 08:47 PM   #8 (permalink)
Master EcoModder
JRMichler's Avatar
Join Date: Feb 2011
Location: Phillips, WI
Posts: 983

Nameless - '06 GMC Canyon
90 day: 37.45 mpg (US)
Thanks: 188
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Get a DC-DC converter for 13.8 volts and put in an alternator ON/OFF switch. Lead acid batteries like about 14.3 volts (varies slightly depending on temperature) to be fully charged, and about 13.8 volts for a sustain charge. Too much voltage is bad for the battery, it converts the water into hydrogen gas.

Turn the alternator on about once per week just to make sure it still works and to top off the battery.

It takes almost a full kilowatthour of power to put enough heat into an engine to do any good. That's enough to drain a good sized deep cycle battery.
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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