OK everyone, lets stop arguing, 370zSteve is totally and 100% correct.
Lets all make a future effort to never disagree with 370zSteve, as he's proven us all wrong, and while our facts and opinions may be correct in the real world, on the internet, 370zSteve is king, and makes all the rules, and is never, NEVER, NEVER wrong.
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As for the requirement Nissan includes in the ECU Reprogramming bulletin - perhaps it's so that Nissan can't fault the tech for incorectly flashing the ECU. It has nothing to do with the ECU, it has everything to do with Nissan covering all the bases, as they tend to do, to ensure that things are done very specifically and in a very controlled way. Nissan has tested their proceedure by having the engine loaded with thier brand of oil. Not hard to imagine. They make it a requirement because that's what they know is in the engine in the conditions that they tested with, and know that to produce successful results.
Now, the real question for the bulletin is this - why reprogram/flash the ECU to correct the VVEL system making a tapping noise....not why did they use Nissan brand oil...
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