Balkamp tire mounting lubricant, part number 7652434.
Photo courtesy of NAPA.
http://www.thisoldtractor.com/gtbender/
Updated: 2010 Dec 09
In the past I've used all manner of lubricants from soap to WD-40. I never had any trouble with any of them, though I was always careful to wash off the excess.
Several years ago I bought a gallon of the real stuff and I've been using it ever since. It is inexpensive, lasts a long time, and does a great job.
Balkamp tire mounting lubricant, part number 7652434, sold by NAPA.
Photo courtesy of NAPA.