At our trailer rally last summer Lippert took out the 1qt an replaced ours free of charge, (10 minutes at most) they did this in all of the 5th wheels at the rally even the one's with no problem, ie preventive maintenance so to speak
On the OP's comments about taking their trailer to another dealer is that most time but not always other dealers will not fix your unit under warranty if you did not buy from them, thus it cost you the time an the parts. So a simple warranty problem like adding a quart of oil could cost you the price of the oil an a hour of labor which could be well over $100 ...
Safe travels