Blue logs

The RuneScape Wiki also has an article on: rsw:Blue logs

Blue logs
Released							20 February 2006 (Update)
Members							Yes
Quest item							No
Properties
Tradeable							No
Equipable							No
Stackable							No
Destroy							Drop
Examine							A number of chemical covered wooden logs.
Values
Value							4 coins
High alch							2 coins
Low alch							1 coin
Weight							2 kg
Advanced data
Item ID							7406
Twisted League							Yes

Blue logs are created by using a blue firelighter (obtainable from completing any clue scroll) on some normal logs.

When these logs are burned, they create a blue fire. This action awards 50 Firemaking experience, 10 more experience than lighting regular logs.

Note: Blue logs can be added to the Odd Old Man's pot boiler, but the resulting fire will be normal, and your logs will be lost, so this is not recommended.

Blue logs burning.