How do i siphon gas from one car to another?

If it is a newer car, then you probably wont be able to do such. They have an Anti-Theft fuel system in the tanks. Its garbage, but it works. Now, if you are sure you can siphon the tank of the car, you can get something like a hose, stick it down in the tank, then suck on the tube till you get a "vacuum" going. WARNING! you will get gas in your mouth. There are such things as siphon pumps, but they don't work so well, and the are pricey. Just be a man and do it. People have been gargling gas for years. You will be ok. Just dont swallow any. Then once the gas starts coming, stick the end of the hose you were sucking on in the other tank. Or a suggested gas container.