[House of Darts]

Dry ice in the fuel cell will change the dielectric content of the fuel. As the dry ice evaporates the CO2 will, to some degree, go into solution with the gasoline inside the tank. That can throw off the readings on a fuel check. If you still intend to do this just remember that there will condensation in the fuel cell. Your are diluting the fuel again and this will change the dielectric and you will be running H2O plus the fuel.