With gas prices increasingly becoming a popular topic of discussion across America, it's no wonder that better gas mileage is a hot topic in Detroit. Even so, says a study commissioned by Johnson Controls, a maker of high-tech batteries used in hybrid vehicles, the pain at the pump isn't enough yet to start moving mainstream consumers toward hybrid vehicles. That, says the report, won't happen until the price per gallon is somewhere between $4 -$5. Despite the results of that survey, consumers definitely want better gas mileage even if they aren't ready to make the leap to a full-fledged hybrid vehicle.