Adrain
You've hit the nail right on the head. The ball technology in 1996 increased where the oil stayed the same. I spoke to Len Nicholsen from Kegle who has been dressing the lanes for the PBA for over 20 years.
They are only limited at the moment with what they can do with the oil. Hence why Kegle has been working on new stratergies like SPORT patterns and different ways of dressing lanes, in return getting the most out of the oil they are currently using.
I can tell you now the ball companies will ALWAYS stay ahead. I know of one company's tech guy who clearly stated " they haven't even developed oil for the sh*t I got ". They just won't be caught!
It goes to show that balls that were around in 1996 are still very effective (if well maintained). I can tell you that Track has realised this by releasing a new ball called the " Track Magic, The HEX ". This ball is basically a Triton ELite Pearl, with a different look on the lanes. Available in a pro shop near you now, at a very very good price!!!!