Is this oil ok

[nissannewby]

What Yettis beast said. Put in a reputable other brand once and next oil change it was very black. Went back to Penrite and all clean again. 270000k all on Penrite. ZD30 Di


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You do realise that means the other oil worked better than the penrite? Diesel oil has detergent additives and other sort to keep to carbon and whatever else suspended in the oil. So if the oil is staying clean then it is not doing its job and all the contaminants are staying somewhere. If the oil cant keep the carbon, soot etc suspended then it doesnt go through you filter either.