system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why is the price of Oil has fallen 51% from 30 months ago, yet the price of Gasoline is only down 15% (Canada) & 36% (US)

By comparing the price of crude oil from June 2014 (right before the price dropped) to now and then the national average for gas prices in Canada and the US, the gas prices are not reflective (especially in Canada where we are flirting with the pre oil bust cost of gas). What gives?
gpt
The cost of crude is only about 65-75% of what goes into the cost of gasoline (in the US).  The rest is from refining, transporting, marketing and taxes.  Since the rests of those costs haven't changed (much), just decreasing the cost of crude will only decrease the price of gas by about 2/3rd that amount.