Forced Induction no one to talk to

lineyho

I am a new owner who bought a 2010 370z with a GTM TT from a seller who new absolutely nothing about the car. I have a few questions that I was hoping to get a few answers.

Questions:

Oil temp runs at around 240 once it stablizes. Is that normal ?

There is a spacer on the oil pan. I guessing because more oil is needed for cooling on a TT ?

How many quarts does this engine take with the added spacer.

Do I need an oil temp cooler ? ( I don't drive with a led foot all the time)

I assuming the bumper has to come off to clean or replace the K&M filters ?

An OS Giken LSD was installed. When changing lanes or turning a sharp corner from a stop or slightly rolling I have felt what feels like a little slipage possibly coming from the LSD. Not sure what it is, but do not know if this is normal ?

Anyone one know a good tuner between Bellevue and Everett in Washington State ? The car was tuned last in June at R&H garage in Seattle but there dyno computer has crashed since then and lost the records. Don't think I want to take it there.

I plan on getting this car tuned because every other day or so it will start knocking lightly out of the blue. If I stop and turn the engine off, wait a minute and restart, the issue resolves until the car decides to do it again. Nothing that I do catylizes the event. Most of the instance were just driving 65 down the freeway and all of a sudden the issue start. Had a friend read the code and he said it was a misfire code.

Any thoughts would be appreciated.