Dry sump engines use the bleed oil from the rod journals to lube the cylinder walls, and there's always plenty of oil mist in a running motor.
If you look at two strokes, ALL they have is oil mist, even for the crank (some do pressure feed the crank but most don't)
The piston oilers are more about cooling than anything.
Dry sump systems usually oil better than a wet sump due to less abuse of the oil (less frictional heating and aeration)
And more power/efficiency!
