OER Parts offers a wide selection of Oil System & Parts for your 1978 Buick Century. OER Parts offers 1978 Buick Century Bypass Valves, 1978 Buick Century Dipsticks and Tubes, 1978 Buick Century Filter Adapters, 1978 Buick Century Oil Coolers, 1978 Buick Century Oil Filters, 1978 Buick Century Oil Pan Baffles, 1978 Buick Century Oil Pans, 1978 Buick Century Oil Pickup Tubes, 1978 Buick Century Oil Pumps, and 1978 Buick Century Oil Senders.