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Another Vegas Run and Oil Temps scared me

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

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Old 07-26-2010, 04:52 PM   #1 (permalink)
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Originally Posted by Lug View Post
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.
That's fine and dandy, but even Nissan cannot predict what will happen if you're pushing oil temp that high on X, Y, or Z oil. Different oils have vastly different protection levels at a given temperature.

I have to say, 260-280 is very high for a Group II-based oil (conventional). Those kinds of sustained oil temperatures are the reason we have synthetic oil available anyway.

After looking at UOA reports on Nissan Ester Oil on normal change intervals, it would be kind of scary to push 260-280 degrees on an oil with relatively low viscosity at temperature.

That said, 260 degrees is nothing for an excellent Group IV or V-based true synthetic oil. Using a good oil will net you some peace of mind, at the least.
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