When played, all vehicles are scored after the chosen vehicle is moved. The Direction cards indicate the direction the selected vehicle will me moved. If a vehicle moves backwards, it does not turn, but uses the reverse gear to move backwards. The game board has an oval testing track of 23 spaces. Before each game, players fill the punched spaces with the chips displaying the drain covers and oil spills.
Some chips represent oil spills.
When a vehicle ends its movement on an oil spill, all vehicles are scored. The value of an oil spill space is zero. If a vehicle moving backwards to the normal flow ends its movement on an oil spill, it spins around so that it once again is facing in the clockwise direction. The Starting space is larger than the other spaces to accommodate the need to place all four vehicles here at the start of the race. Thus, it may always have four vehicles in it.