He did that so to make sure the fuel in the tank is new and fresh, which is what's best to tune on.
Also to keep the RON up.
BP or Shell 98 RON will do you fine.
Member complains about Garage Cafe drive way.
Alvin says he parks out side and gives no fucks for Garage Cafe drive way.
Wasteland members jump on saying Alvin drives a R35 GTR.