Crude oil prices down Friday, gain over week

Crude oil prices were down slightly on Friday, but increases earlier in the week meant that the price of oil added 3 percent for the week.  May contracts for Brent crude on the International Petroleum Exchange lost 14 cents to $66.32 per barrel late Friday afternoon in London.  West Texas Intermediate crude for May delivery was down by 48 cents to $66.37 per barrel.