A city that drives at every hour
Most cities have a rush hour and a quiet night. Las Vegas has neither. Traffic on the resort corridor and the arterials around it runs at every hour, and a great many people here work shifts that put them on the road at three in the morning as readily as at three in the afternoon.
What that means mechanically is running hours. A car here accumulates engine hours, compressor hours and brake cycles at a rate a nine-to-five commuter car in a temperate city never approaches — and it does all of it in Mojave heat.
Running hours, not miles, are what end an air conditioning compressor, a water pump, a fuel pump and an alternator. A Las Vegas vehicle with average mileage has considerably more hours on it than that mileage suggests.
The corridor crawls
The Strip and the roads feeding it move slowly by design and by volume, and slow movement in this climate is the worst case for cooling.
The engine is at load, the air conditioning is at maximum against solar gain through glass, and there is essentially no airflow through the radiator or the condenser because there is no road speed to provide it. A fan that engages a few degrees late or a thermostat that opens slowly is invisible in a temperate climate and puts the temperature gauge up here within minutes.
It is also continuous braking at full vehicle weight with no aerodynamic drag helping. Pads are consumed at a mileage that makes no sense on paper, and heat plus brake dust is what seizes a caliper slide.
Batteries and the heat that never stops
Heat, not cold, destroys a lead-acid battery. Under a bonnet in a Mojave summer that clock runs several times its design rate, and Las Vegas nights do not cool enough to slow it much.
Three years is a normal life. Four is fortunate. Replace on age, before summer, rather than on failure in a car park at midnight — which, in a city that drives at every hour, is exactly when it will happen.
The same heat cycling makes plastic cooling components brittle. Radiator end tanks, thermostat housings and coolant elbows split all at once while hot rather than weeping a warning first.
A used market full of high-hour cars
The rental and fleet turnover here is enormous, and a large number of those vehicles enter the local used market.
They are not necessarily bad cars, but they have a particular profile: high running hours relative to mileage, a great deal of idling, and heavy air conditioning use. The parts to look at are the ones that count hours — the compressor, the alternator, the water pump and the cooling fan — rather than the ones that count miles.
Nothing under a Las Vegas car rusts, so the underside will look excellent regardless. That is not evidence of an easy life here; it is evidence of no road salt.
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