High Mileage
I get your confusion. I initially read it as millage (tax assessments) as opposed to mileage.
Sometimes wish I still had my old ‘95 Jeep Cherokee. Put 290k miles on it before trading it in. That inline 6-cyl engine was amazing. Never burned oil, still got me 22-24 mpg on the highway. Only complaint with it was that I had to budget for the annual windshield replacement.