Reply to thread

Message: <blockquote data-quote="MustangChris" data-source="post: 645870" data-attributes="member: 10830">ford recommends not using any additive at all in their oil.keep in mind out manuals were published 11+ years ago, so the additive technology might not have been what it is today.I suggest going with a lighter oil. It frees horsepower, and one of the smarter-folk on this forum suggested it to me and i have never looked back.5W30 is what i run year round now.5 being the viscosity of the oil when its cold and 30 being the viscosity when its at proper opperating temperature.5W30 will flow better when cold than 10W30.edit: notice how the 30 stayed the same. Switching to a 5W30 instead of 10W30 will not harm your car once it reaches opperating temps. think of it like a speedometer gauge.  5 is the minimum speed and 30 is the maximum speed. your "car" (oil) will "drive" (flow properly) from 5 to 30. isnt this better than 10 to 30?due to the polymers added to motor oil, the oil will not thin past "30 weight."just be sure to use a premium oil that meets or exceeds all industry standards to help protect before it begins to warm and to make sure it protects your engine.(Motorcraft or Moble 1 or royal purple, for example)you should note that many newer cars use a very thin oil... 0W20s and what-not...</blockquote>