26Jun/100
Best Source for Crude Prices
By far the best website I've come across so far for finding spot and futures crude oil and heating oil prices is the EIA government website.
The link for the current and historical spot prices is: http://www.eia.doe.gov/dnav/pet/pet_pri_spt_s1_d.htm
The link for current and historical futures prices is: http://www.eia.doe.gov/dnav/pet/pet_pri_fut_s1_d.htm
Heating oil prices happen to very carefully mimic the price of jet fuel that I need to use for airline industry analysis.