Originally Posted by Kyle2k
Why no e85 performance tune?
To be honest, we will not touch E85 for tuning. While it can be a great fuel, it is far to inconsistent to trust in this situation. This is the same reason why, when you look at a factory tune, they don't add all kinds of timing into the vehicle. E85 degrades rapidly, and cannot be reliably treated as any better than 89 octane.