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Oil again - be careful of Castrol Edge 5W-50!

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I have the "classic" formulation in my boss, no issues. Have oil analysis too, will post when I can get home and check the numbers. Nothing has ever come back in a concern area however, I know that.
 
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Not to my knowledge. The only ones that I know for sure that do are Motorcraft and Amsoil's 5w-50.

That said, both the Mobil and Castrol are excellent oils. I wouldn't hesitate to run either.
 

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