Help! I had a dead 12 volt battery and took it to Ford dealer for new one. Since then my gas mileage has gone way down! Today I got my oil changed (at Valvoline) and the mechanic said that he noticed the date on my radio display shows the year 2000, and I was pretty sure it used to always pop up with a date ending in 2013 (I have a 2014). could the dealer disconnecting my 12volt battery have dumped the updated programming in my car? What should the current program show for a date on startup? Thanks!