On average a NASCAR get 4-6mpg, so during a 500mile race they would consume 80-125gallons of fuel.
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I don't believe that NASCAR is using ethanol. I know F1 race cars use it.
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.
They use the truck haulers to transport everything race to race.
No, they do not. Manual transmissions are used in Nascar race cars.
Yes
During a NASCAR race.
Yes they do, they use it to determine whether they should postpone or call a race.
Unlike the Nascar Nationwide Series, the Sprint Cup Series does not use rain tires.
No, they can not. Nascar does not use rain tires. Just like any other Nascar race, they would have to wait for the rain to stop and then begin the track drying procedure.
Nascar cars do not use normal gas gauges due to the fact that when the cars are in corners the centrifical force causes the fuel to slosh around in the fuel cell, Which in turn would cause the gauge to sometimes show that it is empty and sometimes full. That is why they use fuel pressure gauge instead. Which tells the driver how they are doing on fuel via the needle bouncing back and forth.
As many as they need to use. There is no limit in Sprint Cup.