# What causes an engine to run lean

**URL:** https://forums.speedlife.net/t/what-causes-an-engine-to-run-lean/189422
**Category:** PittSpeed Automotive
**Created:** [April 20, 2007, 10:53pm UTC](https://forums.speedlife.net/t/what-causes-an-engine-to-run-lean/189422 "2007-04-20T22:53:35Z")
**Posts on this page:** 1
**Showing post:** 5

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### Author: ![The1SloR\_T](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/the1slor_t/32/5984_2.png) [@The1SloR\_T](https://forums.speedlife.net/u/The1SloR_T)
#### Post date: [April 21, 2007, 8:34am UTC](https://forums.speedlife.net/t/what-causes-an-engine-to-run-lean/189422/5 "2007-04-21T08:34:40Z")

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> [@Microsoft Excel Help with Text Formula](https://forums.speedlife.net/t/microsoft-excel-help-with-text-formula/29632/16):
>
> usually the your car gets better gas mileage when you go lean…

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