PITTSBURGH (NewsRadio 1020 KDKA) — The smarter you drive, the more you save.  MarketWatch.com‘s Rith Mantell has some tips for saving money on gas – as much as 15 miles per tank.  In a typical SUV, that’s a savings of a gallon of unleaded. She talked with KDKA Radio’s Rose and Paul on the KDKA Afternoon News. Take a listen!