Whew......ok, let'* work on your questions! First, I did see a noticeable difference when I put the K&N in. I also modified my airbox soon thereafter, and saw even MORE of a change. You can see what it looks like here: http://home.attbi.com/~bill.wren/
Just click on the Bonnie link at the bottom. You gotta let that sucker breathe. The K&N alone won't do it. A CAI will do best, but an unprotected cone will draw hot air, which you DON'T want. You need some kind of heat shield. In the meantime, while waiting for a CAI, I have what you see. It works, and draws cold air.
For the engine coolant temp, we're all doing the same thing. 180° Thermostat, (you have to get the gasket from the dealer, the seal from the auto parts store where you get the stat), and also ADD another tranny cooler. Mine ran 220° and now runs under 200° in city driving.....summertime! Things are cooling down in the windy city right now, so I'd hold off until spring on this mod.
For the SC oil change, follow this link: http://www.bonnevilleclub.com/forum/...percharger+oil
to review the whole thread, or just go to your pontiac dealer, buy 2 bottles of oil (you'll probably want to flush it first with one bottle) and follow my procedure...cut and pasted from that thread:
"Gotcha. I changed mine for the first time right after I got the car at 70k miles.
Bubba, do exactly what the Rat said to get the oil There are 2 sources on the net for it, but by the time you pay shipping, it ain't worth it. They come in little bottles. About 10 bucks for 8 ounces, I think. Buy 2 or 3 bottles. No ****. You'll wanna flush it.
This procedure is for Series I (92-95), I don't know how much different the Eaton M90 is, so this is for the M62 (what year is your Bon?)
Pull the smaller of the two covers off the blower, on the pulley end of the supercharger. You'll see a small plug (1/4" NPT if you know your plumbing sizes) out of the nose cone assembly. You don't want it hot, but make sure it'* warm.
Put a Jack under the Front A-arm or sub-frame on the driver'* side and raise it. This will force the oil towards the pulley end of the nose cone and make it easier to suck out.
Get a large syringe from your local drug dealer or farm/feed supply, and some 1/4" tubing from the auto parts store. A foot will do. Press the tubing onto the end of the syringe, and use that to suction it out through the fill hole. Refill it with a clean syringe and tubing, not a funnel, cuz you have to see when the oil reaches the bottom edge of the threads. The last time you fill it, let it off the jack (level car) before filling it.
Good luck! You just bought some peace of mind."
Hope all this helps! Good LUCK!