I run on low/med grip asphalt also, I've never tried the blacks but I would assume that the yellows did'nt last for many runs. And yes I have better success with no sauce this is due to many factors. In my case while the track is blown off and soda applied the sauce just pickes up the dust that is still present on the track and coates the tires making them super slick. As for a better setup post your complete setup; I've been running dbl pink Jacos all around with decent sucess.