The Silverado has a badge on the tailgate that advertises “flex fuel vehicle”. That is supposed to indicate a seamless transition between fuel types does it not?
Yes flex fuel can run from E0 to E85.
My SIL has a flex fuel Chevy, his calculations indicate E10 is the lowest cost alternative per mile.
E85 is too expensive relative to the energy content.
I guess my Cummins diesel is flex-fuel.
I run used dino motor oil and any type of combustible hydraulic fluid I can get my hands on at about 5% by volume. Oddly enough, the mileage increases more than the volume added.