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Originally Posted by s30series
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Some misinformation floating around here leading to arguments with no conclusion. I think the biggest of all is the argument of hot oil in our platform being a problem.
It has been long discussed in oil threads that the biggest problem with our platform was cavitation and the fact that oil pressures did not rise linearly to the increase of RPM at high oil temps - in fact they plummeted near the top - low oil pressures at extremely high rpm = bad.
The link you post does not focus on this information and therefore does not relate to the issue at hand, as it is not the hot oil temperatures that are causing this, but rather the poor oiling design within the engine. Hot oil is not the issue... cavitation is.
Currently no one knows (I think?) about the changes in the new engine in terms of oil flow, and I would be EXTREMELY curious to see if this problem was resolved. But I fear not, as this has not been addressed in any of the detailed talks about the new gen. Either way, we'll see when people start slapping pressure gauges on and analyzing.
People like ZDan and many others, including me, run hot oil temps on low viscosity oils just fine and have been doing it for tens of thousands of miles without issues. In some ways, that goes to show that EVEN with such a (major IMO) problem as oil cavitation at such hot oil temperatures, our platform is able to handle it quite well and reliably for most folks.
Also, stating that the FA20/FA24 tolerances, oil pump, etc., were not designed to withstand high oil temps sounds like a FAT guess at something you don't know. Our platform rises in temps quickly when pushed, I am sure the engineers did not pass that down during testing. We are not talking about temps of 300F+ anyways, it was simply stated that modern synthetic oil can handle these temps without a problem.
No one is saying you shouldn't get an oil cooler especially if you are taking this car out to the track a lot. But I do believe that an oil cooler is not REQUIRED for the majority of drivers for this platform - hence why it was not used in Gen2 for the obvious reason being additional cost.