I have a 2010 g37s with 33,000 miles i was wondering if i would need a brake fluid flush? I read a couple of forums people say every 2 years.

 

I do it every 2 years. I didn't feel like it was necessary but I had the time.

 

2 years for me too.

 

how many botles would i need to replace it with 3? i was thinking about getting motul rbf

 

If its dark or cloud or has any visible contamination, flush it. It you do a track day or extremely heavy use for a prolonged period, flush it. If you do a brake job, flush it. Other than that, I'd say once a year.