Today I decided it was about time to change the oil in my shocks (they don't appear to be leaking, but its been over a month since I've last done them last). Just a few quick questions:

1. When I dumped out the oil from inside my shocks, it is typically always a brownish color. I'm assuming this is because of clay/dirt that has gotten into the shock oil. Is it normal for the used shock oil to be dirty, or do I have a leak somewhere that needs to be fixed?

2. Also, I am rebuilding my shocks a bit different then normal (stock setup). I am using the setup that Mike Burris posted a few days ago on here (Nismomike). It says to use a #3 piston in the front (same as stock), and a #2 piston in the rear. So, I understand that much. But the setup sheet also say's 5 limiter for the front, and 3 limiter for the rear. What is the limiter? Are the numbers Mike uses the same as stock? I'm sure when I hear the answer, it will be one of those "doh (smack my head)" moments, but I am drawing a blank. Thanks for the help guys!