# E85 content analyzer?

**URL:** <https://forums.speedlife.net/t/e85-content-analyzer/258358>\
**Category:** Shift518 Automotive\
**Created:** [May 11, 2011, 6:18pm UTC](https://forums.speedlife.net/t/e85-content-analyzer/258358 "2011-05-11T18:18:49Z")\
**Posts on this page:** 1\
**Showing post:** 12

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**Author:** ![jdaniels](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/jdaniels/32/6399_2.png) [@jdaniels](https://forums.speedlife.net/u/jdaniels)\
**Post date:** [May 12, 2011, 4:45am UTC](https://forums.speedlife.net/t/e85-content-analyzer/258358/12 "2011-05-12T04:45:57Z")

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> [@Who tunes 5.0L Mustangs around here](https://forums.speedlife.net/t/who-tunes-5-0l-mustangs-around-here/41952/182):
>
> phone post so bear with me…unless your car is running closed loop at wide open throttle, it’s not correcting for ethanol content changes. With that said, knowing your ethanol content at all times is manditory. Just keep in mind that the little shake testers run a few percent high. People have seen as low as e50 and as high as e90 on The zetironix

Most factory ECU’s will reference the LTFT’s and will adjust power enrichment accordingly. We’re talking small numbers here, not big. I would be surprised (and not pleasantly) if a factory ECU was not capable of doing this.

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