Quote:
Originally Posted by imag
Yeah... you're totally wrong. Anyone doing an oil analysis at the first change, bike or car, will show you that there are metal shavings in the oil from break-in. I actually subscribe to the fast break-in method, but to say it's all broken in on the test stand is just misinformation. It's no wonder that the bike shop laughed at you.
Also, during break-in, your car burns oil, so synthetic is not desirable (it doesn't burn well). I actually think this Z just burns some oil as part of normal operation, so I'm going to stick with the Nissan Ester, but I think people with good synthetic will likely be fine.
And: for those excited because their motor hasn't seized up in with ~15K miles - that's not exactly a ringing endorsement of any oil, no matter what it is. You could not change the oil at all and get 15K miles trouble free. Not saying your oil change is wrong, just that that data point is pretty much useless.
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Metal shavings...no ****. Physics...man, physics...
Your cylinders are honed into a file-like crosshatch pattern when new, and when the engine is first fired up (with oil in it), they "file" down everything and get the rings seated.
And where do those shavings go? Into the pan, with the oil, that ships with your car that you drain out at your first change, and some shavings stay in the engine because you can't get them all out...so they're there until you're ran enough oil through the engine and filter...
Also numerous cars come with synthetic oil from the factory...nothing wrong with using synthetic from the moment you get a new car home, drop the oil out of the pan, and refill it...
Also, in chosing the correct oil - if it meets Nissan's spec in the manual (I don't remember what it is, but it's common) - Nissan can not deny a warranty claim over it. You don't have to use Nissan's oil. There is no "but I think it'll be fine" - fact is, it will be fine.
Nissan can recommend you use Nissan air filters and oil filters too, but that doesn't mean anything - they're just trying to get you to buy something they have a mark-up for, instead of what could potentially be better for your car.
Case and point - Nissan Ester oil - is it synthetic or not? Is it Group III, Group IV, or Group V...?
And the bike shop didn't "laugh" at me...they wanted me to buy their oil, and take OUT the synthetic. Sound familiar?