I siwtched to Torco and had considerable increase in runtime, along with that I changed the venturi,learned how to be smoother(like the cat that is whoopin up on ya) and after about 3 race nights and some dilligent practice I got the smooth feel down. +1 on the long straight trick too you could prob save a lap of fuel in a race with just a few simple changes in your style of driving and them are free tools to life.I am no expert but I did pay attention. Red Dragons