I usually notice it after a fill up and for a few days thereafter. The smell goes away and then comes back after the next fill up. I'm very careful not to let any gas drip anywhere but into the filler neck, and I've checked everywhere for a leak and I can't find one. The car runs fine. Any suggestions? A new gas cap perhaps?

 

Check around the top of the gas tank in the front trunk. There is a turn-off top on it with a gasket to stop leaking, also the gas line (under a lot of pressure) attaches to it.

 

Thank you