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Discussion Starter · #1 ·
On Facebook I saw a conversation about E40 use in untuned N's. The thread says that the ECU will adjust to E40 and it's ok to put a few gallons of E85 in with your fill up of 93. Adjusting to keep the AFR in a safe range is one thing; most engines will adjust for some extra ethanol by changing injector duty cycles, so I can see that. But does it do anything for performance?

Has anyone tried it? Will our engine ECU increase the timing to take advantage of the extra ethanol, or is this purely for that turbo squeezed corn juice smell?
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