That is assuming a constant fuel cost and mpg over the time period, and the recouping of the purchase price difference of the same model in a conventional gasoline model. It also did not include the depreciation cost, the insurance difference and so on. There just isn't enough usage data to go any further. I see where you are going with this, means more huge government sponsored facilities to recycle the fancy lithium hybrid battery packs. Instead of a tax credit on hybrids, they should have to pay a tax penalty for future recycling programs. LOL.