If you want the longest mileage on tires get all-seasons.

If you buy any summer tires, at least on our 4.8, I go only 10K-12K MAX on the rear set.

I also go through two sets of rears for each front set.

In the past I have used these summer tire brands. Prices are for each tire.

Yokohama Advans (staggered)
295/40-20 rear=$266
265/45-20 front=$290

Vredestein Ultrac Sessanta Suv (staggered)
First set = $214/rear 315/35-20, $189/front 275/40-20
Second set= $269/rear 315/35-20

Just had Ultra-High Performance All-season General G-Max AS03, size 275/40 fitted to four 20x9.5. Not enough experience with them to say what kind of mileage.