Synthetic oil stopped my lifters from rattling on startup. Same filter, so not an ADBV issue.
The rest is just some warm and fuzzies. Knowing in a worst case situation, like overheating I have a little bit longer before spinning a bearing. More resistance to sludging.
A 5 quart jug of M1 cost me 25$ or under, 5 quarts conventional, 12 to 15$.
yearly oil changes, I can afford some warm and fuzzies for 10$ extra per year.
No lifter clatter to me, is priceless.
Somebody call the cops, i'm running 0w-30 in an engine that when made, 0w-30 was not even available!!! 'm not even in a cold climate where i could even benefit from a 0w oil. I should go back in time and find a SJ rated motor oil in the 10w-30 flavor, because thats what my owners manual recommends!!
Motor oil has so many popular myths surrounding it, I pretty much tune out all internet recommended wisdom, especially from the older crowd who have years and years of Pennzoil/quaker state wax sludge myths to perpertrate, as if it was still 1983.
Conventional oils have really closed the gap with synthetics.