Ford outsources all of its parts to subtier vendors. Most of the time these are domestic suppliers. Other times they are not. All must meet specification requirements. Every part I've purchased from Rockauto, I've known who the supplier is. When I purchased a PCV hose for my Fiesta oil catch can, it was OEM, at half the cost from Ford.I guess cheap is ok for a ten year old car. But, I think most Ford parts stores will cut a good deal on O.E. replacements that are sure to fit. an example would be the oil drain plug gasket given as an example. Ford does not service a gasket for that part as it's integrated into the drain plug. If a buyer wants to save money they should go to the parts department and get prices on cases of oil and air filters, 4 or 5 drain plugs and a case of cabin air filters! It is generally alot cheaper and can be rolled into the loan if the buyer plans ahead. Besides, if you wouldnt feed you dog a china made dog biscuit,why in the hell would buy your fiesta a china made tie rod end!
Neither have I, At work i always use them, but i only do that for the one car that MIGHT leak.I don't get the gasket thing. I've been changing my own oil in all my cars for almost 20 years and not once have I replaced one of those crush washers. I've also never had any leakage.