system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: why are semi truck engines diesel, while passenger cars' are gasoline? Why are there no gasoline big rigs?
gpt
Diesel engines are also a lot more tolerant of extreme conditions such as running non-stop and idling for extended amounts of time. Gasoline engines tend to overheat when idling for a longer-than-reasonable amount of time, and a constant duty-cycle causes them to wear faster. A diesel engine can last 500,000 - 1,000,000 miles if properly cared for. Most gasoline engines are lucky to achieve half that.