Savings Saturday. Pretty cool PHEV calculator from the US Dept of Energy. Plugged (get it, plugged) in my info - 5 cents/kWh, $2.64/gal, 25 miles/day EV, 9000 miles/year - calculations were spot on from my use last year. https://fueleconomy.gov/feg/Find.do?action=phev1Prompt