When you go to Nissan you could always ask for the GTR mechanic to do all your changes and do it on the GTR lift as well which accomodates for a lower car....
At least this way you are getting someone that has to deal with people that own 100K dollar Nissans....
Otherwise jack the car up, hit the drain bolt change the oil filter put drain bolt back in put recommended oil type and amount in put cap on lower car down and start her up
--- Thats the cliff note version with no commas and extreme fragments in the sentence. haha