I've used 20W-50 Valvoline in my Alfa twin cam for the last 39 years. The original engine was sidelined at around 220,000km, but only because of a significant rear main seal leak. Apart from leaks, the original engine and its replacement did not / do not appear to use any
oil that is measureable.
Digressing from the original question just for a minute....if most wear occurs at startup, why do modern ECU controlled engines zing up to close to 2000rpm immediately? Seems counterproductive to me, probably something to do with less emissions, but surely causes more wear.
Cheers,
Glen