Looking at the D&D 2024 Dungeon Master's Guide Oil of Sharpness:
The old one from 2014:
Do we think this is a typo or the intent to make permanent +3 magic weapons?
Oil of Sharpness
Potion, Very Rare
One vial of this oil can coat one Melee weapon or twenty pieces of ammunition, but only ammunition and Melee weapons that are nonmagical and deal Slashing or Piercing damage are affected. Applying the oil takes 1 minute, after which the oil magically seeps into whatever it coats, turning the coated weapon into a +3 Weapon or the coated ammunition into +3 Ammunition.
This clear, gelatinous oil sparkles with tiny, ultrathin silver shards.
The old one from 2014:
Oil of Sharpness
Potion, very rare
This clear, gelatinous oil sparkles with tiny, ultrathin silver shards. The oil can coat one slashing or piercing weapon or up to 5 pieces of slashing or piercing ammunition. Applying the oil takes 1 minute. For 1 hour, the coated item is magical and has a +3 bonus to attack and damage rolls.
Do we think this is a typo or the intent to make permanent +3 magic weapons?