That motor is sealed but you can drill a small hole just large enough at both end caps and gravity feed some turbine oil to the wick. These style motors have very large size wicking material at both ends that's doused in turbine oil. I wouldn't bother oiling those but I've been through enough of them to convince myself it isn't needed.
I've also been through a slew of the older round style motors and even those that have seen an insane amount of use with more than 1/8" end play on the commutator shaft still have more than enough traces of oil on the wick and shaft when taken apart. I still take them apart, blow them with compressed air, lube the wicks/shaft, check and clean motor switch contacts, lube the centrifugal switch, and set end play at 1/16 inch if needed simply for peace of mind.
Dryer motors are a completely different story. ALWAYS oil those whenever possible. Heat radiating around and through them drys out the wicking material and causing the commutator shaft to seize up.