2003 Terminator has sat inside protected garage for last three years with a 1/4 tank of fuel which was fresh then and well treated with Stabil. It was run for 15mins to run it through. The Mobil 1 synthetic was changed back then, and battery has been on float charge since that time. What’s the best way to flush out the old gas before it’s started again? Is there some way to connect drain hose to fuel rail and use fuel pump to push it out before filling with fresh gas? Thanks.