Yes, I have a spare from an older Crown Vic in my trunk. A word of caution, though. If you have a sure grip rear you wouldn't want to go far, if at all with this on the rear axle.
Jus' sayin'
C
Why? How would it be different than driving the car in a circle? The outter wheel will be rotating much more than the inner wheel while making a circle.... Does making turns ruin a SG?