I have a 07 Cobalt. Car is losing oil but there is no leak or the smell of it burning. Help!!!?

Why won't my key FOB work?

2011 Ford F-150, I went to use my key fob and it didn't work at all, so I went to use the key in the door and that didn't work either. Luckily the keypad worked and I got in. I reset the fob without getting a new battery and it works now, but still my key won't work in the door, and also I was wondering why did I have to reset the fob? What could've gone wrong because I didn't even have to change the battery...

Have a friend move their hands on, under and behind the dash while you bop down a piece of rough road. At the point the rattle stops tell friend to keep hand exactly where it is and not to let go. Sop. Look. Figure it out.