I'm sure some of the smart owners out there have figured this out, but at what price point does it make it more cost effective to run on gas alone? Obviously the variable is electric price, but there must be a fairly simple calculation that can be made. As Connecticut electric rates climbed 30% over the past 3 years ($0.20/kwh) and gas prices have fallen, the cost savings has to be very minimal at this point. Additional considerations must be: 1) Charging efficiency - particularly on hot days when the battery pack has to be cooled. 2) Battery efficiency - a) as the battery gets older AND b) as winter temperatures decrease efficiency. I love driving in electric mode and think it's better to use the battery rather than petroleum products, but I'm curious about the true costs balance. Anyone figured this out? Steve