nice write up, I just did my oil cooler install on my m54 e36, went about it a little differently and saved a bunch of money..
Hows it working so far?
I noticed before my cooler I had a little knock from the bottom end and now there is no knock and it runs much smoother. also my ofh gasket was shot and I had a nasty leak there.
Turbo lag is actually a headstart to make it fair