The Canadian dollar strengthened slightly against a firmer US counterpart on Monday as oil rose to its highest intraday level in nearly three months. The Canadian dollar ended at C$1.3110 to the greenback, or 76.28 US cents, slightly stronger than Friday's close of C$1.3117, or 76.24 US cents. The currency's strongest level of the session was C$1.3068, while its weakest was C$1.3144.