OAKDALE — Manteca had trouble finishing shots but did more than enough to topple Oakdale 4-1 in its first Valley Oak League contest Thursday. The Buffaloes (1-0-0, 9-3-0) are riding a four-game winning streak since losing to Tracy via penalty kick shootout in the title round of the Buff Cup. “We had opportunities early,” Manteca coach Justin Coenenberg said.