[ATX750i]

Is a skid pad bad for our cars, NON-M. As in running in a circle to learn and test the point of adhesion(sorry for SP) of the tires? Im running a set of RE050's, should I upgrade for better handling, and they are RFT's. Gonna ditch them too the next time I get tires. I ask this because I know that the S2000 dumps oil into the intake during right turns. Wondering if something to this effect takes place in the Z4.