# 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:** 4

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**Author:** ![fmfkid250](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/fmfkid250/32/5973_2.png) [@fmfkid250](https://forums.speedlife.net/u/fmfkid250)\
**Post date:** [April 21, 2007, 8:07am UTC](https://forums.speedlife.net/t/what-causes-an-engine-to-run-lean/189422/4 "2007-04-21T08:07:25Z")

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> [@Aiya, I totally sold out to daily driver comfort](https://forums.speedlife.net/t/aiya-i-totally-sold-out-to-daily-driver-comfort/29641/21):
>
> i’m looking for the major causes…and some of the dumber less common ones. My neon is running lean…pulled the plugs today and they are a bit too white on the ends and my gas mileage SUCKS!

usually the your car gets better gas mileage when you go lean…

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