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Regarding the original post....
High revving engines typically do have oil pressure issues. At high speeds, there are several issues, especially cavitation and starvation. In *most* cases, the issues can be solved by using higher viscosity. I can only hope that the oil pumps meet the pressure requirements, and only let down by viscosity. But if the pump itself isn't rated for those pressures and RPMs, then the whole car should be avoided.
My BRZ is my only experience with Subaru engines, but I can speak for other OEM engines with high redline. I worked on lubrication issues on engines with redlines 8600rpm (flat-plane mid-engine Corvette), but we were never able to get past 7500 without spun bearings and completely destroyed con-rods.
I feel the pain. When I first bought the BRZ, I thought I would keep it till I die, as long as I prevent rust..... but with all these issues, I'm seriously wondering if modern cars are even worth becoming future classics.
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