The product being the magazine,may well be a good product in itself,but as it contains information,"which may or may not be correct", that is directed at,and available to the public,ie classic car enthusiasts,,some of who will act on it,and believe all that is printed and said is true,questions about any potential mistakes,errors,misinformation should be raised!
The classic car magazines in general get info right,but are not immune to making cock ups,and of omitting important info for the sake of lineage space!!
Nothing that any of them write about should really be taken as gospel!
It was stated that the cam had no significant wear,but the followers did,suggesting they had not been replaced,therefore a new set of followers could be fitted,and would,should bed in properly.
Just dropping the followers in a bucket of 20/50 to lube them up,wont make a blind bit of difference what the ZDDP content is.
About 8 yrs ago my engine developed a tap,I found that it was the seals in 1 follower had failed,I just happened to have a few in a box of spares,s/h yes,but showing minimal wear.
I fitted one of these,and its still going strong!
As the rest were perfect,I took the chance,rather than fit a whole new cam and followers!