My best tank has been 26 mpg, the worst 21 mpg**, and the current is 24. I live in Eastern Washington - rural area, mild climate, no heavy traffic, and no daily commute (retired). Mix of town roads, highway, freeway, gravel, and even some 4x4 level "roads" in the foothills (The Blue Mountains) where we live. Stock 2024 LC with roof rails (I removed the cross bars), 18" wheels, running boards, and Toyota skid plate. Almost always in ECO mode, 6K miles, and use 92 octane fuel.
Compared to the 1991 FJ80 LC I drove for a dozen years, with 12-13 mpg, I welcome the fuel efficiency of my 2024 FJ250 LC. I avoided LC's during the 8-cylinder era and only considered the FJ250 because of it's hybrid engine.
** Actually, my worst tank was 18 mpg on a 300 mile freeway trip pulling a very lightweight boat on a single axle trailer.