There are tons of discussions on this on SVTP and other major Mustang forms about the oil I am using in paticular. I basically followed the guidelines of many people who are already running Amsoil 10W30. I am very pleased with it and the car runs fine. Just because it is a recommendation from Ford doesn't necessarily mean it's required or the engine will blow up. I have over 3k miles on the oil and couldn't be more happy.
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Airaid CAI | Borla S-Type Catback | Amsoil 10w30 and MTG Trans. Fluid
382hp 387ft/lb | 1/4: 12.9 @ 112mph
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