Fuel Requirements

['14_YukonXL_Denali]

I recently purchased a 2020 Seirra Denali 1500 w/ the 6.2l.
Last time I gas'd up I noticed a sticker on the inside of the fuel door saying the truck required Premium Fuel.
I read the truck will make adjustments for lower Octane, but Reg Fuel is not recommended for long term use.
Does this engine have higher compression than previous versions? Is this a high-performance engine?
I had a 2014 Yukon XL Denali w/ the 6.2L. Ran it for 150K on 87 Octane w/o any issues.

 

['14_YukonXL_Denali]

Just thought I'd add that I switched to 91 Octane last fill-up.
Certainly, feels like it has more pep, and I think I'm getting better MPG's.