After V1.15 we still can not re-fuel with the Classic's, Formula Reiza and the Retro's. I'm not sure why this restriction is in place, still? I know that with the amount of fuel given I could do a 1 hour race at Montreal with the Classic's and Formula Reiza and Retro's almost 2 hr race. And I would assume that with the Classic's a 1 hr race you would need to pit for tires???