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I'm sure you all have seen their commercials, has anyone moved to Castrol brand oil?
According to my sources, in the 5W30 category there are 25 other oils rated higher. In 1,2,3 order, the top three are Amsoil S3000, Amsoil ASL and Redline. All of those are synthetic. For comparison, the Amsoil S3000 achieved a rating of 5147 points, Amsoil ASL = 5129 points and Redline = 4813 points whereas the Castrol Edge achieved a rating of only 3949 points, nearly 1200 points below the Amsoil.
 

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I've always been using Castrol. I'm a big fan. I use the German stuff, 0W30; it works great and my engine never seems to burn any of it.
 
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