what oil to use

Why, a lifter is still a lifter, its just machined better and made better but what about the camshaft ? I think it still could use the zinc. Those lifters are $$$, that extra money could buy alot of good racing motor oil. The racing motor oil will be better for the rest of the engine, bearings, pistons.

Just because if you use a roller cam --or high buck lifters--and the cam does not get wipe out, doesn't mean the rest of the engine would not have had less wear if you had used a oil high in zinc.. Zinc is good stuff for everything in the motor, crank, bearings even oil pump. It have less wear most likely by just using a good name brand racing oil. Cost 2x as much and it last 3-4 months. Thats $25 pre oil change, a small price for less wear everywhere.

Of course some oil company's are going to say your motor does not need zinc, but the real racing motors that use roller cams, they still use zinc racing oil.