Precisely, so the less trips you need to take, the more reliable the vehicle is. It's a single axis. It goes from "inoperable and on fire" on the left to "exist

Precisely, so the less trips you need to take, the more reliable the vehicle is. It's a single axis. It goes from "inoperable and on fire" on the left to "exists only in far flung sci-fi fantasies" and the more trips to the mechanic you take, the further to the left of that axis your car is. This is why vehicles that need oil changes every 15,000 mile (~24,000 km) are more reliable than ones from a few generations ago that were essentially constantly being serviced.