When we begin to look at the impact on performance that forged vs streamline elbows cost us on fluid system performance, it is equally impressive.
The first pic I have posted below is the visual differences between the forged and streamline fittings. Although I suspect everyone already knows the smooth tubular bend fitting is the streamline fitting, here's the pic anyway.
The second pic is the flow performance graph of the AN-10 fittings and the third is the same flow performance graph for the AN-12 fittings.
The XRP research illustrates both the flow differences between AN line sizes and also the flow loss associated with the forged style fitting vs the streamline style fitting. I think we all know we should use the streamline fitting design so I won't belabor that.
Flow-wise the AN-10 streamline fitting has approximately a 4 PSID 𝚫P. By going to a AN-12 streamline fitting the 𝚫P PSID does not even reach a 2 PSID 𝚫P.
In the end, beauty is always in the eye of the beholder. That said, when the difference in cost between AN-10 and AN-12 hardware is vanishingly small, as it is, there is simply no good reason to cut corners on something as important as your engine's
oil supply.