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Old 09-16-2020, 07:07 PM   #8 (permalink)
bwilson4web
Engineering first
 
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Join Date: Mar 2009
Location: Huntsville, AL
Posts: 792

14 i3-REx - '14 BMW i3-REx
Last 3: 45.67 mpg (US)

17 Prime Plus - '17 Toyota Prius Prime Plus
90 day: 58.25 mpg (US)
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At "7 miles," you're right at the distance the car gets warmed up. Based on my experience:

1) Engine block heater - helps get the coolant up to efficient operating range.
2) Spoof coolant temperature sensor - (MAY NOT BE LEGAL) trick the car into using fuel efficient control laws. This may not bring the catalytic converter to operating temperature quickly.

Bob Wilson
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2019 Std. Range Plus Model 3 - 134 MPG3 || 2014 BMW i3-REx - 117 MPGe, 39 MPG
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Retired engineer, Huntsville, AL (five times AutoPilot saved.)
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