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Reply	Pedant says: Liquid helium is so liquid that it flows up the sides of its container!  (no votes) Tags: water, fluid, liquid, oil.
	posted on 2010-02-20 19:53:20 | Report abuse

Reply	Paul_Pedant says: There are some experimental results at the bottom of http://www.roymech.co.uk/Related/Fluids/Fluids_Viscosities.html Many organics (benzene, toluene, chloroform, methanol) are both less dense and less viscous than water. Stuff like car aircon fluid will scream out of a tiny leak, much easier than water. Liquid ammonia and concentrated nitric acid are very runny too. Astonishingly, mercury is less viscous than water at just above freezing point, despite being about 13 times as dense.  (no votes) Tags: water, fluid, liquid, oil.
	posted on 2010-02-23 23:20:00 | Report abuse