Quote:
Originally Posted by VCuomo
It's incredible how much BS is out there relating to oil.
Let's see, Corvettes, Porches, and a bunch of other high-end autos come from the factory with 100% synthetic (and supposedly Nissan uses a synthetic blend, not a "break in oil", as its factory fill). You can switch to 100% synthetic (like Mobil 1, Amsoil, Redline, Royal Purple, Nissan's ester oil, etc.) whenever you want. You can do your first oil change as early as you want - but I'd wait at least 2K to 3K miles to get some use out of the factory fill.
And you should use the viscosity that Nissan recommends - 5W30.
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If you are saying there is no such thing as a "break-in" oil then this is not accurate. It has always been for as long as SYNTHS have existed that for a new engine it is best that a natural mineral oil be used as an engines first oil for at least the first 3000 to 5000 miles rather than using a SYNTH when breaking in an engine.
The reason is entirely based in that using a SYNTH (with its extra friction-preventing additives) for break-in does not allow the kinds of internal cylinder pressures required to FULLY expand and set the rings properly against the cylinder walls. In fact even Royal Purple has a specific "Break-In" oil (and named just that BTW:
Royal Purple Engine Break-In Oil ) that is a blend of natural mineral oil and SYNTH. It in essence provides the best of both worlds.
Being that Nissan Ester Oil is a natural conventional oil then in essence when the Nissan service people said that the engine had a "special break-in" oil they were technically telling the truth. They are in essence keeping the SYNTH out of the engine until after the 3750 mile "break-in" period has been met.