"Why they would put (m)ethanol in a car than CANNOT legally burn it in a race is weird. Not sure about this sanctioning body, but some test the fuel in the winning cars to see if the fuel was doped. Perhaps they changed out this fuel cell to remove that question."
Sorry, but there is no methanol allowed by IMSA regulations. Sunoco 100-octane unleaded gasoline is the only fuel permitted. (Teams which come from the ACO's series in Europe may not use the TotalFinaElf fuel provided by the LMES or ACO when running in North America, and teams from IMSA cannot run the Sunoco fuel used here when running in Europe.) However, the Sunoco fuel used in IMSA is NOT the same fuel used by NASCAR in Nextel Cup racing. Most US motorsport uses Sunoco fuel.
I thought so. Methanol has long been illegal in IMSA US races. Same for SCCA. I never had to worry about it since I just took my 10 gallon jugs to the Sunoco fuel pumps, along with a $100 bill. Yikes. It was nearly $5/gallon when I quit racing.