King Fahd has not been running the world's largest family owned petrol station for some time now.

And right now, the Saudi royal family does more than run the  central bank of oil.  Saudi oil is once again making Saudi Arabia into a financial power.

Back in say 2002, when Saudi Arabia was producing about 8.5 mbd that is sold at (ballpark) $30 a barrel, it was taking in about $88 billion a year.

With production of 9.5 mbd, maybe more, and an oil price of $60 a barrel, Saudi Arabia's oil now generates roughly $208 billion a year.

That is an extra $120 billion.  Some of this cash is being spent, but certainly not all.  OK—Riyadh is not as financially important as Beijing.  No one is.  But Riyadh and Moscow certainly are in the next league ... both have a ton of spare cash to play with.