Commuter cars get run to death then disposed of. Even if you just trade them in after a few years, the next owner is going to continue running them into the gro

Commuter cars get run to death then disposed of. Even if you just trade them in after a few years, the next owner is going to continue running them into the ground. It's why the ownership curve is inverse to the lifespan. Cars with big engines are typically someone's second (or third or fifth) car, they get kept around longer because they're special, and also don't get driven enough to rack up kilometers. The peak of longevity in sub liter cars is from most of them being classic micro cars and the rest being Japanese Kei cars. They don't get driven very far, but a large portion of them are from the 50's and 60's so they're skewing the longevity numbers and the mileage numbers.