1989 Ford F 250 "fuel filter located 1990 f250" Questions

fuel filter 1990 F250 (dual tank) need special tool? can I check for clogging in situ? the filter is located approx under the driver on the inside of the frame rail, I think you have plastic fuel line

need to know fuel filter location 1990 f250 6cyl Along the right side underneath along the frame

fuel filter, air filter.. no clue....checked the oil.. it was 1 1/2 quarts low.. and is in need of an oil change.. mileage is over 200,000 miles. could the oil filter be causing all the problems since