A fire requires fuel to burn, air to supply oxygen, and a heat source to bring the fuel up to ignition temperature.
Some Americans cross the border just to fuel up on some Mexican food.
Krantz hangs up before he can say any more and tells his number two, Ralph, to fuel up the jet for a trip to Miami.
Egevang was surprised to find that the birds often stop for a month in the open North Atlantic Ocean, probably to "fuel up" on fish and small crustaceans before setting off to cross the tropics.
Therefore, the choice of the object of conversation should also be cautious, otherwise it will become self defeating, let their confusion fuel up, more and more vigorous.