Muslims, how are you going to visit Mecca when all the oil runs out?

Now, sure, some of you live in Europe, Russia, etc, but visiting Mecca ('Hajj' ?) is going to be a big turn off when it involves a year long trek and maybe a trans oceanic trip on a sailing ship. Plus there's the whole 'no oil for printing presses' thing, might make it harder to keep pumping out holy books without involving people who might introduce new ideas especially if they get to translate from Arabic to whatever. So...I don't really see your religion continuing unchanged. It will mutate, probably into things ....different than current Muslims would approve of. Sorry but unless Allah himself starts helping out around the Earth with little miracles that help create a cohesive Islam, you won't have a single version of Islam. Not that you even have one now. Well, happy trails.