# Talk:Potion of oil
One interesting aspect of identifying a potion of oil is that if you have no applicable items apart from an unidentified potion of oil then when you hit "a" NetHack asks you "What do you want to use or apply [*]" which can be used to indirectly identify a potion of oil in a shop without buying it. --82.18.65.37 23:04, 2 June 2008 (UTC)

Lit Potion of Oil
The highlighted method of identification is apply the potion of oil to light it; but, oil doesn't work on charge system like a can of grease.  How does setting the potion alight (once) affect its subsequent applications? --FJH 18:54, 19 March 2011 (UTC)

Oil lamps don't have visible charges either. The potion has a max life of 400 turns, this is stored in the "age" value of the potion, same for an oil lamp. As far as I can tell, the age has no other effect on the use of the potion; you should be able to lite a potion for 399 turns and use it to untrap, throw it as a fireball, repair weapons, etc normally. The only place it does check is for refilling a lamp; the lamp will gain double ("burns more efficiently") the remaining age of the potion, so a full potion refills 800 lamp turns. -- Qazmlpok 21:40, 19 March 2011 (UTC)
beatitude
does being blessed have any effect? the article doesn't say either way. --212.183.128.89 12:44, 15 March 2012 (UTC)

I don't see any difference for a blessed potion in potion.c.  The differences I see for a cursed potion are listed on the wiki.  A blessed potion will still abuse wisdom (unless you like fire and are drinking a lit potion), blessed charges a lamp as much as uncursed, etc.  Derekt75 16:35, 15 March 2012 (UTC)