# My mpgs are suckingggg help!

**URL:** <https://forums.speedlife.net/t/my-mpgs-are-suckingggg-help/263445>\
**Category:** Shift518 Automotive\
**Created:** [April 18, 2012, 8:49am UTC](https://forums.speedlife.net/t/my-mpgs-are-suckingggg-help/263445 "2012-04-18T08:49:02Z")\
**Posts on this page:** 1\
**Showing post:** 9

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**Author:** ![usmc2801](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/usmc2801/32/6387_2.png) [@usmc2801](https://forums.speedlife.net/u/usmc2801)\
**Post date:** [April 18, 2012, 9:44am UTC](https://forums.speedlife.net/t/my-mpgs-are-suckingggg-help/263445/9 "2012-04-18T09:44:51Z")

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> [@Police Checkpoint: 5/29](https://forums.speedlife.net/t/police-checkpoint-5-29/49208/7):
>
> Air filter clogged up?

Didnt think of that good call, check this first.

> [@Police Checkpoint: 5/29](https://forums.speedlife.net/t/police-checkpoint-5-29/49208/8):
>
> Change your o2 sensors

Do not change both, change the front one and see if there is any change, if not consider checking the rear one, but I would def check the air filter first…the rear o2 can affect the AFR but its mainly for the catalytic converters performance.

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