Thanks doc. Maybe thats just how CRDI's is, non CRDI's are not as dark as observed.. And gas engines remains as golden oil for a long time.. I'L just stick to 5k filter interval on manual just to be safe.
Just a regular water filter pero pwede din sa oil. Available at ace or handyman. Here's the thread of DIY http://tsikot.com/forums/nissan-cars.../index152.html



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I've installed a pleated media and still observing if downpipe will be needed.. Here's the link for my mod 



