Could be pretty good. Depends on where you live, is it really hot or cold. How fast do you drive on the highway, etc. Here in TX it is hot and I run the AC all the time and drivers go fast when they can. such as normal cruise if not heavy traffic is 75-85.16k miles on 20” ats yielded us 2.35. 2k miles on the new aero wheels has yielded 2.7 and that’s with half of that being a super slab road trip.
Gen 1 DM R1T. Pretty good IMO.