Interesting. I did a similar experiment with the 1.8L, 2010 Prius, and other than a check-engine light, it ran fine. Eventually I found E50 ran without the check-engine light and a code that indicated it could not increase the injection timing. Unfortunately the local cost of E85 did not make economic sense. The cost per mile was higher than E10. But the retail price of ethanol was much greater than the wholesale price. If sold with the markup as wholesale gasoline, it would make economic sense. There are aftermarket hacks that adjust the injector timing, keeping the injectors proportionally open a little longer, so the car does not throw a code. Bob Wilson
Nice video... Questions- Any changes to car (Prius E85 Kit?) sounds like no? Are you running E85 or mix of E85 and Regular? What is MPG impact vs. gaso? What is cost comparison vs. gaso ?
If the car isn't made for E85, you risk damage to the fuel system long term. The water picked up by ethanol from gas station tanks tends to be salty and acidic.
Owners manual directly warns you not to do this due to risk of damage. Check Warning lights warn you you are doing damage. Check You admit you have done this on a national forum. Check I am not predicting the warranty work will be covered.
I appreciate anyone who 'looks through the telescope'. Please keep us informed of your progress. I've done 'run the tank dry' on: +30 times - Gen-1 Prius +6 times - Gen-3 Prius 1 time - Gen-5 Prius Prime +10 times - BMW i3-REx Your experiment has merit. Bob Wilson
