I attach a small funnel either directly to the oil line port or a piece of hose attached to the port. I fill the funnel with motor oil and let gravity do its thing.

After attaching the oil line I remove the coil wire (and spark plugs if they are in place)and crank the engine over to build oil pressure. I do this two or three times.

Finally when I start it I avoid increasing the RPM's until it has been running for a fair amount of time.

Good luck.

Randy