The reason I ask, is that I’d probably stick to only oils that delrin (what I believe the sprung anti backlash nuts are made from) has an A rating for chemical resistance, and gear/hydraulic oils are a B on resistance. Cleaning with mineral spirits and lubing with mineral oil looks like it might be a safer bet.
Is it going to cut the work life of the nut in half? Unlikely, but mineral oil is cheap too, and should degrade the nut less over time.
His bucket head vac suggestion is great though, I very highly recommend it to everyone that runs fluid in their water table. I belive it was one of his other videos that got me to buy one.