Apologies for the necromancing but can you expand on why you recommend Super Lube 92003 over 21030. Isn’t 21030 too thick for the idler pulleys?
This what Bambu recommends for the z rod screws and the top right and left linear rails and you can also dab some on the bottom of the rear pulleys on the back of the printer. The one on the left is the oil is the one on the right is the grease for the Z-Rod screws. You have to be careful on what you’re buying because many of the super lube products look the same but they are all different so take note of the part numbers. This stuff will last you quite a long time and I believe it cost me around 40 or $50 on Amazon.