differentiate btwn motor and hyd. oil

[DZink24]

all, i'm in a slight predicament. when my dad passed several years ago, in his shop were many, many gallons of an oil like substance, in unmarked containers, for the most part. i have narrowed down the majority of them, power steering, ATF, anti freeze, gas/oil mix, ect. there are still about 5 gallons or so of "oil" that i have no real idea its true identity. when i feel it between my fingers, it certainly feels and looks like motor oil, but in the container, it just doesn't have that amber glow that motor oil has. i know some of the containers are hydraulic oil, a few of them were marked "hyd". i poured a little of each into glass jars, to hopefully be able to tell, to no avail. they were nearly identical. (i started with known motor oil) does hydraulic oil have more of a pungent smell to it?

 

[JLEONARD]

Find someone who has a "waste oil" furnace and donate it.

My son has one, and it burn all that you mentioned except for anti freeze.

 

[fox]

I would send samples of each in for analysist to figure this out.