20 years ago, Viscosity improvers were a problem. At least that's what I was told by a GM engineer. 7 years ago, I'm not so sure. See the recent post by OVERKILL on today's motor oil blends, it appears that base oils are the biggest problem for oil burning in the rings. Viscosity improvers are still used, but the amount depends more on the base stocks and not the oil grades. Plus there have been improvements in their high temperature performance.
Oil consumption can be caused by many different things. Even the amount of "crosshatch" on the cylinder walls. It's important that any oil that does end up in the rings (which is necessary for long engine life) that 1, can drain back out as needed, and 2, can withstand the ever increasing higher temperatures being present in that area.
Not my choice, but maybe a 0W-16 from new might be the best choice.
And, no, I don't need a multi grade oil in Daytona.
Further, I USED to think that the narrower the viscosity spread the fewer VII's are present. Which was mostly true 20 years ago. That no longer seems to be the case. It's more dependent on base stocks.