Oil prices gain after choppy week

Oil prices rose Friday at the end of a volatile week marked by jitters over Chinese demand and US supplies. US benchmark West Texas Intermediate for delivery in November added 79 cents to $45.70 a barrel, helped partly by an improved view of the US economy after second quarter GDP growth was revised higher. Weaker growth in energy-hungry China this year is expected to cause a slowdown in the rest of Asia, the Asian Development Bank said Tuesday, as it became the latest major body to revise down