The death of Venezuelan leader Hugo Chavez has given traders pause. Venezuela has the largest accessible oil reserves in the world. Instability in the country could provoke a supply-scare that would boost prices.
On the New York Mercantile Exchange, West Texas Intermediate crude oil added 49 cents to $91.85 per barrel.
Gasoline added 7.76 cents to $3.2066 a gallon.
Home heating oil shed 0.26 cents to reach $2.97 a gallon.
Natural gas added 5.3 cents to hit $3.626 per million British thermal units.
At the pump, the national average price for a gallon of regular unleaded gasoline dropped from Thursday's $3.719 per gallon to $3.712, the AAA Daily Fuel Gauge Report said.