I don't know WHY you would want one. Plenty of high scores were shot before the advent of the "super soaker" spongeballs out there today.
The property of oil absorption is "supposed" to migrate the oil from the surface of the ball and give you a more predictable contact patch between the lane surface and the balls surface. The only reason you need that though is because of the high volume of oil being applied to the lane in the first place, and the reason the oil volume is so high is to combat the generation of spongeballs that we had before. It is just a vicious cycle. Stronger ball, more oil, stronger ball, etc........
Yeah, the scores are higher and easier with them ( before they die anyway ), but the more oil they absorb, the more maintenance needed and the more prone to early ball death they are. Neat trick on the manufacturers part was to build crappy balls designed to wear out quickly, then convince everyone that it was "higher performance" than before, and convince everyone that it was what they needed. Not only that, but they try to tell you that you need several of them a year. NICE ONE, HUH?
I've got some older ones that don't soak up oil nearly as much as the newer ones do and they perform just fine and have lasted for YEARS while still going strong.
Unless you are bowling at the highest level to make money, and on very high volume shots, you really don't NEED them. I can understand NEEDING them if you are a PBA member who is relying on tip top performance every shot, but I don't think amateurs NEED such performance, especially on most THS's.
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