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    How Soon to Use Royal Purple?

    Thanks for all the answers, folks! I would have replied sooner, but I thought I'd get an email when someone replied, like with Quora. Anyway, everyone's input is appreciated. For what it's worth, I used Mobil 1 in my Saab 900 and it had gone 340,000 miles when I donated it to the Salvation...
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    How Soon to Use Royal Purple?

    I had to have the 1.6L Ecoboost engine in my 2015 Ford Escape replaced. As some of you may know, a lot of these engines had to be replaced due to cracked engine blocks. Mine was covered under the powertrain warranty. I'm sure that the new engine was filled with Ford's synthetic blend of...
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