I have noticed extra oil burning/smoke from those T's that have them. I have been meaning to address this problem on my most recent build.
Problem: @ high vacuum, the motor sucks up extra oil. This is a hi compression motor. On acceleration it smokes. Had a few Karens mention it.

There is more noticeable oil consumption. Not a noticeable cloud as I drive. Cant see behind myself though.
I may have made the condition worse, but the issue exists on the non modified units also. I modified mine for max flow.
MORE IS BETTER. right?
The original sheet metal pickup opening is only about 3/8 x 1". I made a bigger one- 5/8 x 2" & did a bunch of opening & smoothing to the ramp & feed port. The 3/8 copper line could be improved. I used a 1/2" gas appliance flex line(bigger fittings) for volume, flex, & an added oil cooler effect. I believe the larger pick up with the slung oil pressure creates the equivalent of a reservoir 2" above the hogs head in function. Sustained oil supply for the steepest hills.
The solution would seem to be metering the flow down @ the pan, but, how, how much & what about an unknown/unseeable obstruction in the meter? Another poster tried 3/6" & ended up with 1/8". Changing the line & adding a clear tube would allow for easy monitoring of unobstructed flow.
2 am, my dim witted mind kicked me awake with the answer!
Replace the 90 degree line fitting with a 90 lever gas valve. Note handle position for meter size. An occasional valve full open & run @ idle may bring back the over oil smoking condition, confirming an unobstructed oil flow if the full open hole is large enough. If not, an annual undoing the line for a visual orifice inspection or a line change to some clear tubing. I do have an effective transmission screen, but, it might not catch everything first.
Comments welcomed.