Which Synthetic Oil? - Page 2 - Ford Mustang Forum
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Originally Posted by robb15033 View Post
You can switch to synthetic at anytime as long as there are no leaks.
Mobil1~Royal Purple~Pennzoil Ultra
Go to "the oil guy" web site and do some research. These three perform 7500+ miles per oil change. Its cheaper in the long run and better protection.
Are those the only three that lasted that long? What about valvoline?

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Originally Posted by davidcseifert View Post
Are those the only three that lasted that long? What about valvoline?
Those three tested top in synthetics. Amzoil is great.
And to clarify, those mentioned above are the "extended service" qualifying products.
If Valvoline makes a synthetic then I would do some oil analysis test result research with it and figure out if thats what you want.

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