Rhoads lifters

I am going to assume here that with Rhodes lifters it makes a big difference in what weight oil you use.

I would think that the heavier the oil the less benefit you get at idle and the quicker it pumps up at higher RPM and that thinner oils will take even longer to pump up.

I just put a set of them in the 340, haven't really run it yet, but I am running stock 10.5 forged pistons and a purple shaft 284 484 cam and a Melling High volume oil pump.

I plan on using 10/30 or 10/40 mobil 1 once it is broken in. if it is too noisy I may try 20/50.

What oil / pump combos have you guys used and have you noticed any difference ?