Help! 2007 sts v sullfer smell

[Frankie29ny]

need help when I use a certain gas from well known gas company I get a sullfer smell after parking car in garage when using a different gas company don't get odor but car does not feel as power full I use 93 octane at both stations has anyone experienced this and what to do

 

[Tuna]

I "googled" -sulfur smell in car- and found several forum and other places that talked to this.

There is some sulfur in gas and the additives put in gas. The catalytic converter is supposed to convert any sulfur to sulfur dioxide which is odorless. If you're getting sulfur odor (rotten eggs odor) from you car, then one of the stations you buy gas at has more sulfur in it than the other and your catalytic converters are probably starting to go bad.

I'd look there first anyway.