Wow! Yours has an actual fill line? Outstanding! I never understood why most don't... At least the older ones
. When all my slides and jacks are out mine is right around a quarter full. I would call Lippert and get the exact fluid before I added any.
Scott and Liz - Southern NM
2012 Wildcat Sterling 32RL - w/level up (best option ever)
2007 Chevy 2500HD 4dr short bed Duramax w/allison
Reese Fifth Airborne air ride king pin coupler with Sidewinder