# Power Stroke Help

**URL:** <https://forums.speedlife.net/t/power-stroke-help/267922>\
**Category:** Shift518 Automotive\
**Created:** [November 6, 2013, 4:43pm UTC](https://forums.speedlife.net/t/power-stroke-help/267922 "2013-11-06T16:43:06Z")\
**Posts on this page:** 1\
**Showing post:** 9

<div class="post-metadata">

**Author:** ![STG\_S4](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/stg_s4/32/6785_2.png) [@STG\_S4](https://forums.speedlife.net/u/STG_S4)\
**Post date:** [November 6, 2013, 6:49pm UTC](https://forums.speedlife.net/t/power-stroke-help/267922/9 "2013-11-06T18:49:44Z")

</div>

> [@Cougars](https://forums.speedlife.net/t/cougars/53535/32):
>
> Well that smoke/soot is unburnt fuel. Any od the performance tunes will decrease economy. Also larger tires with no speedo recal will off set milage calculations.

Its about 4mgh off. So that means for every 100 miles add 40. So at 230 miles on ODO I really went roughly 325. So 100 miles a quarter tank average. At 35 gal that’s roughly 12 mpg… still shiiiiityyyyy:banghead

How/where can I get the speedo recal?

---

_[View the full topic](https://forums.speedlife.net/t/power-stroke-help/267922)._