Interesting thing about Race gas is its designed to sit in barrels in storage for long periods of time. So just top off your tank with 100 octane pump gas and it should be good to go for months. One other thing neat about real Rs and RRs is the aluminium tanks never rust. I looked inside my 7 year old tank last night and it looked brand new. I think changing the oil would be very important as acids in the used oil would be removed.