You might want to reconsider the oven thing ..... this passage from the Columbia 300 website also offers some evidence that the more oil = more hook idea is incorrect:
Dear Columbia, I was told that you can put your bowling ball in an oven, a low temp, and not that long, to get that oil out. My coach and friends have done it when I tryed it, my ball got burned and had little cracks all over, I had a Complete Choas, I want to know can you put your bowling ball in the oven?
This question was selected because there were a lot of questions this month asking about putting a ball in an oven to remove oil. You can tell by the question, the potential problem that can occur. Reactive resin balls have a plasticizer in them, which creates pores in the shell. The lane oil will go into the pores removing it from the surface to create more friction with the lane. This is how reactive resin shells work. When too much oil gets into the ball the friction is lowered which reduces the hook. By heating the ball the oil can be driven out of the shell, but the plasticizer will also be removed, which is not good. Putting a brand new ball, which has never touched lane oil, into a hot oven, can prove this. A liquid that looks like oil will come to the surface. This is the plasticizer.
You want this in the ball.
There is also a thing in physics called, "Thermal Expansion and Contraction". When most objects are heated they expand, and when they are cooled they contract. Different materials expand and contract at different rates. When you put your ball in a hot oven it will expand, but the core will expand at a different rate then the shell because it is made from a different material. This can cause the core to separate from the shell. In the case above, the shell expanded from the heat so much that the chemical bond holding the material together were not strong enough to over came the expansion and the shell cracked.
Therefore, DO NOT put your ball in the oven. It is not covered under our warranty.
http://www.columbia300.com/interact/atx.cfm?id=1558&page=2
