DETROIT (AP) — When gas prices spike , filling up gets more painful. But consumers can do something to stretch their fuel just a little farther: Change the way they drive. “It’s a hard one to swallow, right? You gotta put gas in to go about your day and get to work and pick the kids up from school,” said Michael Crossen, Consumer Reports’ manager of auto testing. Here are seven tips from experts for drivers looking to use less gas: Drive slower, or use cruise control Vehicles are designed for