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Title, might be a dumb question but i’ve been seeing a lot of talk about it since it was approved or something.
 

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I've been told it's safe to run up to E30 but you chance leaning out under load if you do so without a tune.
 

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No it’s not recommend, the manual says no more then 10%e should be used. I’m guessing using a higher % will probably cause some problems.
It can as I said above but some stations run up to 15% in the winter which won't harm anything. I'm currently running E30 but I'm tuned.
 

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I use E30 but I use it because I'm tuned and I don't have access to 93. Helps a lot by increasing octane.
Switching to Meth injection since E85 stations are hard to come by and MPG is reduced.
 

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I've been running e15 exclusively for the past 8k with no issues and I'm fully stock. Every few tanks I'll even add 2-3 gallons of e85 (pump says 50-85%) no issues other than reduced mpgs and really not all that much.
 
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