I've had this same problem for a while now.The car would spin out at high speeds or when it shifts into second gear.I tried different tire compounds and they all did the same thing and they wore out REALLY fast.I just switched to 40wt all the way around and I actually drove the car for 3 hours and still have ALLOT of tire tread left and the car didn't spin out once!!!!Try meesing with your suspension geometry and try a thicker oil and it might help you too.