- Joined
- Sep 26, 2010
- Messages
- 9,807
I never did until I UOA'ed the fluid in my 2010 FX4 at around 100K. A boatload of aluminum in it and it was sheared a lot (you can search for the UOA if interested). I dump mine on a new vehicle at 10K and every 50K thereafter. I have a suction gun that works great.