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Old 09-06-2012, 06:26 PM   #1
sc00ter
Scooby Guru
 
Member#: 117767
Join Date: Jun 2006
Chapter/Region: RMIC
Location: Denver, CO
Vehicle:
2011 STI Sedan
DGM

Default Adding 1-2 gallons of e85 when filling up on 91oct tune. Downsides?

I apologize if this is in the wrong section. I was planning on putting it in the engine management/tuning section but it didn't really fit there.

......

I am dyno tuned for 19psi on 91 octane, which is the highest octane rating I have readily available near me (aside from e85).

I have been juggling around the idea of occasionally throwing in 1-2 gallons of e85 when filling up with 91 for a little extra punch. I am planning on doing this when going on mountain cruises once every month or two. However, I'm curious as to what the downsides would be. I know in the long run e85 causes corrosion but would this cause issues with my drive ability since I'm not tuned for it?

I've sent an email to my tuner regarding this but haven't heard back in a few days so I figured I'd ask here as well since the cruise I'm planning on doing this for is in 2 days.

Thanks for any feedback.
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