Gilly,It is 18k or 18 months correct? I thought since i only put 4000 miles on the car in a year i could wait until i hit 18k,the tech told me no that it had to be changed at 18mos.Nissan indicates in the manuel 18k or 18mos which ever comes first.I guess the reasoning is that someone could put 18k on the car before 18mos and they require the change prior to the 18mos servicing.I also didnt see a notice from Nissan about fluid being clear that you could opt out of service,without something in writing i gotta believe you have to adhere to the manual for the service reqs and if you come up with a tranny issue,goodluck! Better you than me if you want to try to explain to Nissan that your fluid was clear.Chemicalman i would check with that tech again and get something in writing.The tech at habberstaad is Anthony,I would contact him again just to be sure.