Hi, newbie here. Just wanted to ask on how do you guys follow the owners manual in terms of changing the ATF fluid or flush (is there any difference). Sorry if its kinda stupid but I'm confused on which to follow. To what I understood on the manual, it's like every two years, when I asked the dealer, they said 30,000 miles, some says wait for 50,000 miles regardless of years. So I'm pretty much confused really. Anyway I own a 2004 G35 Coupe which has 15,000 miles (yes, 15,000) as of today, have all the service in the dealer with Mobil - 1 5W-30 since the first 1,000 change oil and running good. I would appreciate any suggestion or better yet, those who actually had their tranny flushed/change ATF fluid. Thanks for the help

 

30k miles or every 18 months