Driving patterns.
Depends a lot on your driving patterns and how much fuel you burn just sitting there at idle. The Blue BAT burns 0.6 gallons per hour stopped, idle, in gear. I can end up spending 15 minutes waiting at lights in a 20 mile urban drive. Let's say I get 20 mpg while in motion. I would burn 1.15 gallons with engine on at lights or 1 gallon with engine off. That is the difference between 20 mpg and 17.4 mpg.
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Truck Nut
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