# What To Know About China's Record-Breaking Weichai Diesel Engine

> In America, the average mpg of a semi truck sits firmly in single-digit territory. Efficiency improvements mean that today's trucks now average around seven mpg, but some states still see trucks achieving less than six…

- **Source:** [SlashGear](https://www.slashgear.com/1914538/china-weichai-diesel-engine-everything-to-know/?utm_source=gearopen.com&utm_medium=referral&utm_campaign=feed&utm_content=687c10712e15dac1edc70626)
- **Published:** 2025-07-19
- **Category:** Cars
- **Tags:** #average #breaking #china #diesel #engine #less #record #trucks
- **Canonical:** http://localhost:4321/a/687c10712e15dac1edc70626

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_GearOpen's distilled summary. The full original article is published at SlashGear (source link above); GearOpen does not republish the source's full text._