Oil prices fell as much as 4% on Wednesday after China said it would slap additional import duties of 25% on $16 billion worth of US goods, including oil and diesel, in response to US fresh tariffs on Chinese imports. Also, weak crude import data from China and a smaller-than-expected drop in American oil inventories weighed. Nymex’s crude oil rose 0.09% to US$67 per barrel in Asian trading on Thursday.