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e60Member
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Discussion Starter · #1 ·
Can anyone recommend which viscosity to put on 170k mileage 320cd diesel. Which one would be better in terms off better protection on engine and turbo at this mileage. Can I still go with 5w30 or better 5w40, I heard that on this kind of mileage the 5w40 is better as it will create a thicker film that will fill up the gaps created by the wear.
 
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