I've used nothing but No Touch Tire Care from Permatex sice the early '90s.
I keep it on my truck tires.....car tires....all my trailers tires......50 hp blue tractor tires.....zero turn mower tires...... '92 Cub Cadet garden tractor tires.....'82 Gilson lawn tractor mower tires.......rubber around windshields.
I found it lasts much longer than 303 on my tires when I worked and had a 660 mile a week commute in all kinds of weather.
I bought a new '90 2500 chevy 2wd. The first thing I do with all my trucks is buy a pair of wheels and have a pair of BFG Mud Terrains mounted.
Anyways I gave the '90 chevy truck to my GS in '07-'08 along with those Mud Terrains which still looked new and no surface cracking/checking even at 80 psi. I'm sold.