Just wondering, what's the deal? What kind of cars, how much gas we talkin' about, and not my business, but why? cause it stinks? you got a leak or something. It shouldn't be stinking up the place. I've used 4 or 5 year old gas diluted with twice the amount of fresh myself without out issue. Never tried to save those tanks though.
I have mechanical Aptitude. I can screw up anything.