OER Parts offers a wide selection of Oil System & Parts for your 1970 Mercury Cougar. OER Parts offers 1970 Mercury Cougar Bypass Valves, 1970 Mercury Cougar Dipsticks and Tubes, 1970 Mercury Cougar Filter Adapters, 1970 Mercury Cougar Oil Coolers, 1970 Mercury Cougar Oil Filters, 1970 Mercury Cougar Oil Pan Baffles, 1970 Mercury Cougar Oil Pans, 1970 Mercury Cougar Oil Pickup Tubes, 1970 Mercury Cougar Oil Pumps, and 1970 Mercury Cougar Oil Senders.