# 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:** 18

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**Author:** ![HKSPOWEREDGTR](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/hkspoweredgtr/32/6704_2.png) [@HKSPOWEREDGTR](https://forums.speedlife.net/u/HKSPOWEREDGTR)\
**Post date:** [May 12, 2011, 1:44pm UTC](https://forums.speedlife.net/t/e85-content-analyzer/258358/18 "2011-05-12T13:44:17Z")

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> [@07 Cobalt SS bolt on thread \*New Pics pg. 3\*](https://forums.speedlife.net/t/07-cobalt-ss-bolt-on-thread-new-pics-pg-3/41317/139):
>
> 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.

On the GTR they run closed loop all the time except under deceleration injector cut off, cold start or fault conditions.

So…I am under the impression that the relatively small change in seasonal ethanol content is not a big problem for me. Still…I’m not confident enough in this statement to not datalog.

Thank you all for the advice/experience.

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