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.
No there is no maximum in NASCAR.
On average a NASCAR get 4-6mpg, so during a 500mile race they would consume 80-125gallons of fuel.
Depends on what type race car you are asking about. A top fuel dragster uses around 22 gallons of nitromethane for one run down a 1/4 mile track. A typical Nascar vehicle will get about 4 to 6 MPG. Other race cars are somewhere in between.
Nitrogen
Gas tank for race cars
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.
Street cars air (which is manily Oxygen, nitrogen), race cars nitrogen.
Usually they use synthetic race oil
No. Considering that the average race can generate well over $100 million for local economies the 6000 gallons (avg) used over a race weekend is well worth it. In addition, over a 36 race season this adds up to 216,000 gallons a year. When you take into account that the United states consumes 400 million gallons a day, it quickly becomes apparent how little impact NASCAR has. One season is equal to .00054% of what the country consumes each day.
I believe they still can get all that they need, un-regulated, however, the fuel is charged to the team, or the sponser, and is paid for to Sunoco.
Because they gave NASCAR more money.
HI. you can use regular pump gas, as you already know. But people who drag race muscle cars sometimes use stroker engines....which can run on methane...or alchohol.