[aigel]

Buy a basic 12v fuel pump, connect a couple long hoses, add a switch, connect to 12V (be safe to avoid sparks) and pump that tank empty. Modern cars have recirculating fuel, so with fresh gas on an empty tank, it will recirc the remnants of the bad gas out of the lines.

If you don't want to go electric, you can get siphon pumps at any autopart / auto tool store. I used to resurrect old cars, it has always been sufficient for me to pump out the tank and refill with new. Sometimes a bit of MMO would help with deposits on carbureted vehicles ... on FI, a can of FI cleaner ...

G