Whichever fuel you guys decide to run, do yourself a favor and store it in glavanized metal containers....and try to keep the container at as a steady temperature as possible. Try to keep it in the shade while at the track. Fuels, whether pump gas or race fuels, are sensitive to UV rays and wide temperature changes. Race fuels are even more sensitive to UV rays. Properly stored race fuels have an almost indefinite shelf life while typical pump gas will "varnish" up in as little as 2 months.