Crude oil is a fossil fuel, and it exists in liquid form in underground pools or reservoirs, in tiny spaces within sedimentary rocks, and near the surface in tar (or oil) sands. Petroleum products are fuels made from crude oil and other hydrocarbons contained in natural gas. Petroleum products can also be made from coal, natural gas, and biomass. Products made from crude oil. After crude oil is removed from the ground, it is sent to a refinery where different parts of the crude oil are Many of the things derived from crude oil like gasoline, diesel fuel, paraffin wax and so on take advantage of this energy. Hydrocarbons can take on many different forms. The smallest hydrocarbon is methane (CH 4), which is a gas that is a lighter than air. Longer chains with 5 or more carbons are liquids. Very long chains are solids like wax or tar. 6 ways your life would be different without oil and gas Blog / Economy / Operations December 10, 2014 You probably already know that oil and gas products fuel cars and heat homes – 94 per cent of transportation demand in Canada is supplied by refined petroleum products and more than half of Canadian homes are heated by natural gas.