Crude Oil Inventories are a useful measure of the stock of crude oil in a country. They are often expressed as a percentage of the total oil in storage by volume.The crude oil, gasoline, and distillate inventories in a country are important to know, especially when oil prices are changing. The crude oil inventories in a country are important to know because that is where the raw material for gasoline and distillate comes from. The gasoline inventories change because the demand for gasoline goes up and down. The distillate inventories change because the demand for distillate changes. This blog will look at how inventories change and the effect of these changes on the price of crude oil.Crude oil inventories and distillate inventories can give a good picture of what is going on in the supply side of the market.