Oil + additive viscosity

When I mentioned valve train noisier I meant that all singing the same note like a solid cam setup. At idle its fairly quiet. No silly ticking or clacking. Im just wondering whether this is because of the lesser film strength of the thinner oil or maybe the lifters are bleeding down more . Also I have read about the Comp Cams XE series cams being somwhat noisy due to there sharp ramps on the lobes. I dont mind the tihnner oil, Im just asking whether being "maginally noisier" with this oil would there be more wear.
Regards
Billy D.