The 6.0L Power Stroke uses a canister element oil filter on top of the engine. The AMSOIL Absolute Efficiency Synthetic Oil Filter for the 6.0 PSD is Part #EAO-88. The 1994-2003 7.3L Power Stroke Oil Filter Part # is EAO-99. and have a change interval specification of 25,000-miles/1-year. No other company has an oil filter that has these specifications except AMSOIL. When using the AMSOIL 15W-40 Synthetic Heavy Duty Diesel oil or the Series 3000 5W-30 Heavy Duty Diesel oil, the oil filter element must be changed at 25,000-miles/1-year. The specification on the oil is 25,000-miles/1-year, or longer with oil analysis testing.
amsoil_products_for_ford_powerstroke_diesel_trucks.php