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Originally Posted by Z_ealot
210 across all cylinders hot and dry, between about 250-260 hot and wet across all cylinders.
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Was the accelerator pedal pushed to the floor?
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Originally Posted by Z_ealot
The only exception is cylinder 3 and 5 which start out at the same psi as all other cylinders but then lose about 20 psi over the course of a minute.
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Compression gauges have a check valve so the pressure doesn't drop to zero after cranking has stopped (where a intake/exhaust valve may be open)
IF after your test, the pressure dropped, that is a gauge issue, not a cylinder issue.
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Originally Posted by Z_ealot
As for how much oil is burning, keeping track of it since this last oil change i did it had burned a half quart in just under 1500 miles.
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1 quart in 3,000 miles is in the normal range and you don't need to worry.
Start to worry when it burns a quart in 1,000 miles.
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Originally Posted by Z_ealot
Also threw a vacuum gauge on it just to test out and vacuum gauge reads a steady 16 in/Hg which seems like something's up there but talked to my tuner and he insisted it's fine.
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Assuming the gauge is accurate, my stock VQ37 has an intake vacuum at hot idle of around 22 in/Hg.
You might be on to something here...
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Originally Posted by Z_ealot
Also checked cylinders 3 and 5 with a borescope and they show no obvious signs of head gasket failure, still have a nice thin coat of carbon on each of the piston tops so not sure what's going on. Only thing i don't have available to me and I'm not capable of doing where i live is a leak down test which I'm trying to get scheduled at the dealership
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If this was my car, I would not worry about anything and just drive it.
However, for your peace of mind, I hope you can get a leak down test done.
Good luck!