On average a NASCAR get 4-6mpg, so during a 500mile race they would consume 80-125gallons of fuel.
All of it
Is that domestic or industrial use
This was the guy that held a small can to catch the overflow of gas that spilled into a special tube when the gas man filled the gas tank on a race car. In 2011, Nascar no longer required the use of the catch can man. They now use self-venting gas cans.
An estimated 250,000,000,000,000 a year.
I don't believe that NASCAR is using ethanol. I know F1 race cars use it.
Depends on the vehicle you are driving and how many miles you drive in a year.
140 billions of gal per year (2008 est)
No. Nascar does not allow nitrous oxide.
Around twenty four trillion cubic feet