The VX will definitely not run on on E85. That's something fairly new. I read in Car & Driver that Ford & GM are engineering their new engines as "flex fuel" E85 engines because it gives them a nice little cheat around the CAFE standards.
Btw, E85 is a special fuel mix of 85% ethanol and 15% gas, not at all the same as the oxygenated-with-10%-ethanol gas sold around the country these days.