Just recently noticed that after fill up gas gauge remained on empty, then came up.
Well today on way to work filled up again and this time gauge reads slowly back to empty. Any ideas?

 

Mine has been doing a similar thing. Tells you its empty and randomly goes back to where it should be at. Will fluctuate from E to where its supposed to be at the entire time it's being driven. Started out being only an issue if the car was allowed to get below 1/4 tank then filling up. Would take about 10-15 min of driving before the gauge moved back up.

Mine is reading a code however (cant remember which off the top of my head) and a tech at a shop mentioned to me that it could be a short in some wiring near the gas tank. To fix it or diagnose he said he'd have to drop the tank out and take a look. Dont recall the exact specs, haven't had the money unfortunately to take it back in just yet to get it determined. For now just driving carefully to not let my tank go empty on accident.

 

Funny thing about that problem. It stopped and seems to have cleared up by itself.
hope that happens to your vehicle as well. But I will no longer let it go below 1/4
of a tank, just in case.

 

Maybe a sticky fuel level indicator in the tank?