Would motor Oil help when inflating the Rebels??
I don't think putting Motor Oil anywhere near your kite is a great idea..... but a clean pump will usually make things easier IMHO
Uncsrew the top and clean out any sand and crud that's inside, also remove gasket debris on the metal shaft, (alcohol on a rag works well for this) ..... I then use olive oil (cold pressed of course!) as a lube on the inside of the pump.......