Generation 1 Chevy Volt (2011-2015)
I got my 2015 Volt from the dealer with 3/4 of a tank full. I have no idea if the fuel is 91 AKI or not. I don't trust the flunkies at the dealership to realize that it requires premium.
I've heard that the Volt can detect the lower grade fuel and adjust the timing, but is there any way for me...