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The mechanics I lived with were boat & big diesel. Those engines (and aircraft) are maintained on an hourly basis. In fact, your car is too: you change your oil
by thechao 7y ago
The mechanics I lived with were boat & big diesel. Those engines (and aircraft) are maintained on an hourly basis. In fact, your car is too: you change your oil every 3000 miles or 3 months. The idea being that there is an expected speed, and you’ve accumulated (say) 100 operating hours after driving 3000 miles, or in any 3 month period. As such, all these guys computed engine/vehicle life in terms of cost-per-hour.
It’s weird to me that just about every piece of mechanical equipment you’ve ever heard of is measured in terms of operating hours, but not cars? Color me skeptical.
As to the 0.58$/mile: an hour at 55mph would be, what? 31.90$?
- ghaff 7y agoCertainly there's a correlation between operating time and total mileage. It's going to be different for city driving and highway driving but there's a relationship that holds for most normal use cases. That said, there are specific costs that are primarily about distance (fuel, tires). Furthermore, probably overly conservative oil change recommendations notwithstanding, essentially all car makers express maintenance intervals in terms of mileage not hours (which could easily be measured). I'm inclined to give them the benefit of the doubt that they know what they're doing.
- colejohnson66 7y ago> In fact, your car is too: you change your oil every 3000 miles or 3 months. Most synthetic oil I’ve seen can last 10,000 miles or even more.