The oils (light and heavy) can either be used directly for blending into jet fuel or fuel oil or be put through a process known as catalytic cracking. The catalytic cracker produces cracked oil and cracked gasoline. Cracked gasoline has an octane number of 105.

1 barrel of light oil yields 0.68 barrels of cracked oil and 0.28 barrels of

cracked gasoline;

1 barrel of heavy oil yields 0.75 barrels of cracked oil and 0.2 barrels of

cracked gasoline.

Cracked oil is used for blending fuel oil and jet fuel; cracked gasoline is used for blending petrol.

Residuum can be used for either producing lube-oil or blending into jet fuel and fuel oil:

1 barrel of residuum yields 0.5 barrels of lube-oil.