2005 2wd crew cab titan approaching 100K and would like to change the xmission fluid to mobil 1 synthetic is there any risk in not using the Nissan brand xmission fluid?

Might wanna check with your local Nissan dealer service advisor. I have a 2011 Titan with 11k miles an my service advisor actually told me I can buy full senthetic MOTOR OIL an they would charge me a minamal fee to do the work