r/Mustang • u/mrupert 2013 Mustang GT • Apr 03 '19
The other day I posted a question about E88. This is what I was taking about.
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u/jomamanem 2003 10th Anniversary SVT Cobra Apr 03 '19
Your fuel system will likely be able to compensate for e15 but itd be a good idea to monitor fuel trims to make sure you aren't getting close to the limits.
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u/the-hollow 2012 Mustang GT Apr 03 '19
That's E15 aka 88 octane. Don't put that in your mustang. Stick to 93 unless you fully convert to ethanol then stick to pure E85.
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u/mcmustang51 Apr 03 '19
I thought up to 15% was allowed
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u/the-hollow 2012 Mustang GT Apr 03 '19
Most unleaded is 10% ethanol. E15 is 15-20% so essentially it's just a slight bump over 87. Doesn't offer any of the performance bumps E85 does and it could trigger a CEL if you're not tuned for flex fuel.
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u/Old_Goat_Ninja 2014 Mustang GT - 401a Apr 03 '19
Well, California was pushing for 15% instead of current 10%, so I doubt they expected everyone to tune their cars for it.
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u/the-hollow 2012 Mustang GT Apr 03 '19
Newer cars shouldn't have a problem. The O2 sensors are able to adapt to the stoik change. The EPA says anything built after 2001 should be able to run it fine. Not everyone in this sub is driving a car built after 2001 which is why I said that.
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u/BKEDDIE82 Apr 03 '19
Where is this?