They work pretty good. If your car is pushing, sauce the front tires. If you have a rear traction problem, sauce the rear tires. If you have a traction problem and sauce both tires, the front tires will want to take over causing the rear to be loose.

I have used 2 tire traction forumulas, Trinity Buggy Grip and Sticky Kicks, ¡Roja! formula. Here is their website, [link=http://www.sticky-kicks.com/]Sticky-Kicks[/link]. Sticky Kicks gives better traction, there are no fumes unlike Buggy Grip, and it makes the tires last longer. But, just dont expect everything to have the tires 'locked up' on the surface with tire traction formula.