What kind of oil do you guys use for the Mo and how much is needed? What about the oil filter? And one last thing, how do you turn off the Service due sign?
If you're referring to the maintenance reminder, on the first gens you just scroll, using the maintenance button, to either the oil change or tire rotation screen, and hold the same (maintenance) button down for a couple seconds to reset the mileages to 0. Use the joystick to change the mileage reminder distances. 2nd gens and 1st gens with Nav might use a slightly different procedure.
As for oil, I recommend using only full synthetic, and Nissan or another good (ie brand name) filter. I use Mobil oil and M1 filters exclusively, mainly out of habit. Oh yeah, there is also the small fact that with Mobil products my Maxima is still running stronger than ever with well over 200K miles on the original engine.
Many years ago when lots of us started using synthetic oil (way back even before my Nissan service advisor warned me NOT to use synthetic oil), Mobil was about the only readily available synthetic product. Now I find it funny that the same Nissan dealer uses a blend (though I'm curious exactly how much synthetic is actually in that blend) for their own, dealer oil changes. And I know damn well that if synthetic was the same price as Dino oil - which is currently impossible - Dino oil would soon become as extinct as the animals it's named after. Technically, I guess that a mixture of 2% synthetic and 98% cheap oil would still classify as a `blend.' Who knows what dealers use.
If you shop carefully, you can find M1 filters for around $10 and 5 quarts (our Mos take about 4 1/2 quarts) of synthetic oil for a little over $20. So for about $30 and a little over 1/2 hour of your time (if you do it yourself, of course) your Mo can be humming along with new synthetic oil and a good filter.