Firstly, if an oil meets a stringent spec like FA-4 does it matter who makes it? Secondly any reason to not go with Motorcraft? Thirdly is there really any special testing done by Ford or is it just a marketing gimmick? I have the 3.0l TD6 engine and just picked up two cases of 12 quart for $80 each on eBay.
Also, how often should I really change the oil? Just wait for the computer to tell me, do it seasonally, annually?
Also, how often should I really change the oil? Just wait for the computer to tell me, do it seasonally, annually?