- Staff
- #41
DOT 3 is hydroscopic (attracts water); DOT 4 is not. I only use DOT 4, for that reason.
I've been using DOT 4 for quite some time now, and even it still atracts some water. I did mine after 3 years and even the DOT 4 looked pretty rough. I just change it out every 3-5 years to be safe.