Hi Rod, your main concern with a turbo charged engine and different octane rated fuels is Detonation. Detonation can cause serious engine damage and it can take place in seconds. The fact that the Fiesta can run on a wide range of different octane fuels points to the ECU being able to vary the ignition timing and boost pressure over a wide range. Running your vehicle on 93 E10 is very unlikely to increases the risk of detonation because adding ethanol to gasoline boosts the octane rating depending on the ratio. If you do a bit of google searching I'm sure you can find info on the pros and cons of using ethanol based fuels. See link. Automaker Group Says E15 Ethanol Damages Cars, EPA Approval Was RushedHere in the wonderland that is Wisconsin good gas is hard too find sometimes so is it ok to run the 93 tune with 10% ethanol mixed in or should I drop the tune back to the 91 octane tune ? thanks
Although 93 E10 won't increase the chances of detonation, it may lead to other problems. Ethanol Based Fuel Is Destroying AutomobilesHere in the wonderland that is Wisconsin good gas is hard too find sometimes so is it ok to run the 93 tune with 10% ethanol mixed in or should I drop the tune back to the 91 octane tune ? thanks
About 5-7yrs ago now probably lol. E10 has been around up here for awhile now!
