Quote:
Originally Posted by Lug
Nissan put a throttle limiter in at 280 because they think you may get excessive bearing wear at 300. If Nissan thinks your car is fine at 260, I don't know that anyone here has the technical know how and access to Nissan data to really be able to refute that. Remember, the 280 limit is just a precaution, not an engine failure.
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Since thermal breakdown occurs over 240F, I'd wager that 260F is not a positive thing. Modshack posted a graph showing oil viscosity breakdown a few months back.