Quoted from slicknick13:Gasoline is an odd choice, but whatever.
Parts should come out clean, not necessarily new. If you lost plating due to corrosion or whatever, you'll still have splotches of unplated metal or pitting corrosion, they'll just be clean.
That gas though. That'll just get you an oily mess impregnated in your parts.
I have seen guys use gasoline in the ultrasonic for carburetor parts. I agree, probably not suitable for top of playfield parts.