More important IMO than the brand or weight of oil is to do a proper cam break-in and also run a zinc additive at all times after that as well. I'm swapping to a used roller myself..............

When my engines are broken in , prelube with 30wt. Never used the thick break in greases, wouldn't they take up the entire .003" oil clearances?

Never rubbed a cam lobe dry. Also most builds were performer style engines .420-.450 lift, 210-218 durations, 3.23 gears and 4 speeds. Nothing but 30 wt.

okay what is the proper way to break a cam in and also. Is it a bad idea to run some engine lucas in the motor after i break the cam

Use the cam assembly lubs that came in the cam kit. smear it all over the cam lobes and bearings. I also put some on the BOTTOM of the lifters. If the engine has been sitting a long time or is fresh you might want to prime it. I used 10w40 for the last break in but 30 weight is good. Also you need to find a additive w/ zinc. I use an additive From advanced auto, Presolene (or something like that) It has all the old stuff in it that oils used to have. So far so good. Then let it run for 20-25 minutes at 2000-2500 rpm. Drain the oil and change filter and roll on.

and yes always use somekind of zinc additive every oil change.

think me not running the zinc additive is why my cam lobe got wiped out just curious. Also bent a push rod next friday were gonna be putting together im using a bottle of comp cam oil. i bought two bottles of additive figure i will run one in every change.