-Animal
-Phenom
-Goliath
-Ultimate Inferno
-Weapon of Mass Bias
-Super Carbide Bomb
-Triple XXXtreme
-Big Bully
....there's so many heavy oil balls out there that will handle heavy oil. It just depends on what company you match up best to.
As for the drillings: for heavy oil balls, try to keep the pin below the fingers to help produce an ealier and stronger midlane reaction. For asymmetrical balls, keep the mass bias on or passed your VAL to produce an early forward roll. For symmetrical balls stack the CG or kick it out to get the ball to rev earlier.
For me, Track matches up to my game and style very well, and the Phenom and Animal are excellent heavy oil balls!
For others (that I see in my area), they seem to match up a lot better to the Ultimate Inferno or Goliath, and some the Big Bully.
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-Dino