Oil changes for a Stratofortress in flight would be a real trick. You could do what the Keys Brothers did and build a catwalk for wingwalking out to the engines

Oil changes for a Stratofortress in flight would be a real trick. You could do what the Keys Brothers did and build a catwalk for wingwalking out to the engines- not recommended!- or you could do more like what the Hacienda did and run oil lines from each engine into the crew compartment so you can change it from inside, but that's a LOT of extra oil to pump. Going from the #1 engine all the way to the fuselage would be a long way to pump.