Top 10 Diesels and Hybrids With the Shortest Break-Even Periods for 2011 — Edmunds.com
There are tons of articles out there, I will have to retract the prior one simply because it does not dish out a compelling argument. The article does not describe the research process or how numbers were compiled. If you look at the comments you can find more info. The above article shows cars with quick break-even points in case you are shopping for a hybrid.