There's a 1/16" flow control orfice at about the level of the inlet port in the side of the canister. That keeps the pressure drop in the canister to a minimum, since oil that goes through the filter gets dumped back into the oil pan. Oil filters were optional equipment- - - -the engine gets lubricated the same way with or without a filter installed. Even if the filter gets installed dry, the canister fills in a few seconds after an oil and filter change on the first startup. Check the oil level and top it off to the full mark on the dipstick after a few minutes of run time.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!