What are dirt and grime made up of?

Who was vitantonio scaleari? Did Clifford and Davey Allison die within a year of each other? Who is Jackson storm? Can a car still start with a blown head gasket or motor? How fast is a 80 cc dirt bike? How many Nascar Cup Series cars are from Hendrick Motorsports? What words signal the start of the Indianapolis 500? Which part of the formula 1 car has to be removed for the driver to come out? How many races did Jeff Gordon race before he won his first one? What did Indy say to shorty on the bridge before he cut the ropes? How do you pick a motocross bike number? What dirt bike rider is in the Hall of Fame? In the last two televised nascar races there were fiery crashes just a few laps from the end are the cars just going too fast for the tracks and how can nascar keep the cars at a safer speed? What is the top speed of a 2010 formula 1 car? What does the last name maldonado mean? Blue bear from Boyd coddington? What is the instrument of gear? What is Carl Edwards' car number? Which team did Jim Clark race for in Formula 1? How many races has racing driver Pierre Bourque won?