Depends on the design, the 235 Chevy Stove Bolt was exclusively splashed oiled for a number of years. And wasn't changed over to pressure feed until the mid '50s.
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Not totally correct. The 235 Chevy did have an oil pump, and the mains were pressure oiled. The oil pan had troughs in it, that were filled with oil from nozzles (if I remember correctly from the main oil gally). The connecting rods had "dippers" on the bottom of the rod, which scooped the oil in the trough. The oil pump also fed the valve gear. Pretty sure the last year for the splash oiler 235 CID was 1952, and 1953 was the first year for full pressure oiling.
PS: The splash oilers, also had "poured" rod bearings, not replaceable inserts.
Edit: the change over years for splash to pressure oiling, might have been between 1953 and 1954
