How many gallons oil does the earth contain presently? [e-mail]?

Question

How many gallons oil does the earth contain presently? [e-mail]?

Answer 1

seven

Answer 2

Lets say in barrels (144 gallons) about 2 Trillion. But most of it is  bound chemically to other materails and would use more energy to get out, then it will ever be worth it.

The time of the easy, light crude of the Saudis is long time over. We better get used to using modern technology to get wean us of oil