Motorcraft synthetic is garbage, it's not worth the extra money, if it's synthetic-blend you overpaid. SVTP and BITOG both have good write ups and info on synthetic oils. This next oil change I have RP 5w-30 HPS going in and the one after that will be AMSOIL SS 5w-30. I'll be sending out samples of the 5w-20 Motorcraft that is currently in it as well as on the next two changes. Blackstone Labs will send you a free sample kit if it's something you're interested in.
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