Anyone with New Yorkers find the need to oil?. Discuss Anyone with New Yorkers find the need to oil?, on ChipTalk.net the place to go for your Poker chips and gambling tips. Read it in Poker Chip Care.
I haven't found the need either. Usually my quick test to see if oiling would do any good is to lick my finger and run it along the edge of the chip to see if there's any discernable difference in color. If not, then I don't bother. If you're a real chip freak, you'll just lick the chip directly.