Quote:
Originally Posted by nis350
even conventional oil is fine with oci between 3k to 4k miles if the car is driven normally. a few local nissan/infiniti dealers use conventional oil with recommended 3k oci.
premium synthetic oil probably would be good if the car is tracked or redlined every lights.
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After all the oil testing I have seen with the VQ37HR engine I highly recommend using a quality API certified synthetic motor oil only and believe it will hold up a lot better due to the high heat temperature the VQ37HR engine produces. Also has been shown to produce less wear on engine bearings over time. Not all motor oil brands protect the same.