Well after a month of chasing a silly leak on the left rear tire of my lawn tractor I got to the point that I found a inner tube for the tire and had it put in. I never found the where the leak was, sometimes I would go a week and no leak and other times I would go a couple hours and stop at the my shed and refill the tire. I will NOT use fix a flat but I will use slime in the tube. I took the thing to the local tire store and had them check and they found nothing, no nail, thorn or anything. Well that takes care of the problem and the last time I had some thing done this way I ended up using the tractor with the tube in it for 10 years, I just hope it last as long.