I worked in the auto industry for years and never found a hand soap that didn't crack my hands let alone not clean them properly. I just work on them now as a backyard mechanic/ weekend warrior. I work for a soap making company and wish I had this stuff when I was in the auto field!!! The stuff is called Concentrated Magic made by Jack Manufacturing. I run the hand wipe department and the Mechanic hand wipes are great too but the soap is awesome. I'm not just saying this because I work there, it doesn't benefit me any. I just really wish I had it when I worked on cars 6 days a week.
http://www.jackmfg.com/
You can find the stuff in most Fastenal, Ace Hardware, and some True value stores as well as order online.
