Economical replacement rocker arm set?

I personally would put in fresh oil and one additive or the other. Additive packages are reported to sometime have adverse effects with each others. And cam lube is different from break-in oil or oil additive. Hopefully there is some left from the initial cam installation.

I've found that lighter oils consistently give more lifter ticks. I am guessing that it just gets squeezed out of the lifter(s) more easier; that should not happen if the check valve is good and the piston fits tight in the lifter. But weight would obviously not have anything to do with dimensionally short parts.