Gasoline Smell

get rid of the wife! what the heck was she doing with gasoline on or near the carpet?

Is there a Stanley Steamer in your area? Call them. They might give you some hints short of needing to have them out to do a professional cleaning job. If you still want to do something more yourself, try something with some grease-cutting power like Dawn dish soap. Gas is a petroleum product that does have some oily characteristics that may need something more than steam or baking soda to cut thru.

Google.com is our friend!

I did a google search on the quoted phrase, "gasoline on carpet" and got this:

Bake it under lamps and ventilate for a few days. It will volatilize.

Call up Jaswinder and have him drive your 'flying carpet' around til it runs out of gas

Sorry, couldnt resist

If it is not stained, leave it alone. The "cure" might be worse than the problem. In a week or so the smell will go away. Some of these remedies may put a spot on the carpet that is forever