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my motor just hit 140k. runs great and the oil stays very clean. it does leak though and ive been thinkin of a high mileage oil but im not sure because of the synthetics. my fav was mobile 5000. just like to know if i should try something else?
Stick with what your using if it stays clean and you are not having any problems with it. After your next oil change you could send a sample out to get tested... then you will know for sure how it is doing.