A decrease in price of crude oil increases the supply of
gasoline. As the prices of raw materials decreases, the price of
the final goods can be reduced. A reduced price will increase the
supply of that product.
The reduced tax imposed by the government on the gasoline will
increase the supply. The subsidies given by the government can
decrease the price of gasoline and this will result in an increased
supply.
when there is an increase in number of suppliers, a rightward
shift in supply curve can be seen. Along with the number of
suppliers increases, the supply of gasoline also increases.
Another important factor influencing the increased supply of
gasoline is that it always has high demand. Gasoline is used for
making fuels for all type of locomotives including cars, two
wheelers, aeroplanes etc. So it has high supply and demand.