Crude oil prices edged up on Friday after falling over 2 percent the previous session, with analysts saying oversupply and a strong dollar would continue to weigh on fuel markets. “Oil prices will remain under pressure as long as the surplus remains in the market,” the bank added, referring to global production being 1-2 million barrels per day above demand. “Rising speculation that the Fed will raise rates will put further downward pressure on commodity prices,” ANZ Bank said on Friday.