For the last several years (since 2004/5), I've used entry level/light oil balls majority of the time for most of my leagues. Scout, sonic x, jazz, Tropical, slingshot, breeze (x2), misfit (with UFO), and now, Crucial 50-60% of the time. Speed 16.5, <300 revs, low tilt 65-75 rotation, and bowling on medium length light volume. 1st and 2nd shift leagues...