Progressive people of Berkeley, your efforts at saving gas by buying hybrids are misguided! According to an enlightening press release faxed to the Express last week, "Some Americans are paying dearly at the pump for being overweight." Wanna keep that SUV around? Trim a few pounds off your family and watch the savings pour in: "An overweight family could spend an additional $100, $200, or even more per year for driving exactly the same miles as the thin family in the next lane." The press release doesn't connect the dots, but the implication is that the added mass of the fat family's vehicle reduces gas mileage, presumably through intertia. Further studies are needed to prove if passenger height or age have any additional impact.