I popped a left fork seal a few days ago and got the new seals and oil in today. I used some Lucas synthetic 5wt oil because I got it free and holy moly the front suspension works again lol I've got 20k on the bike (probably stock oil) and the front end was getting really squishy on the brakes. Now it's nice and firm but still soaks up the bumps. The front end doesn't compress nearly as much on the brakes. I didn't have a way to measure distance from the top but I put in .56qt in each leg per a post of DanQ's a while back.