Before I get to it. It is important to note that factory recommended oil change for ZMA is 6k. By the time you reach that mileage, your oil would have degraded to an extend that your engine would be running pretty coarse. When you filled new (synthetic or otherwsie) oil, you may get an instant smoothness and the difference would be quiet noticiable. I am pretty finicky regarding maintenance so change oil(mineral) @ 2k or less. At that mileage, oil is still running pretty good. When I filled 'power 1 racing', the difference will be less than it would, had I filled it after 6k. Still there was a noticiable difference especially while idling and while doing 80-100 kmph. The gear change is smoother that anything I have ever experienced over the other oils (HH idemitsu tidewater/savita, castrol activ). In fact I was surprised that my bike gear has the potential to be that smooth.
In conclusion. Since it is not possible to remove old oil completely, the synthetic is contaminated by the presence of the old oil. I will be changing the oil very early with more power 1 racing to remove these traces of the mineral oil and see how the synthetic performs at its full capacity. Have done 33 kms so far, will complete 66kms by the end of the day, Will give a long term report in the future.


yesterday.

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