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Originally Posted by BowDirk
Overall a good article.
One thing that they always assume in these payback periods is that the cost of gas is constant. If they took even a mild gas price escalation of .25/year, and assumed 20,000 miles a year of driving the payback period is much sooner.
bowdirk
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Another variable comes from the fact that not only will different people's mileage vary from their observed results, that the actual
difference between standard and hybrid vehicles can vary depending on commute as well. Someone who does all short trips in traffic without the hybrid battery pack and motor started up might see only 15% improved mileage compared to a non-hybrid, while someone else with a 40-mile each way drive on 50mph rural roads might see 50%+ improved mileage. That would be a bit difficult to explain though in a short magazine article...