Originally Posted by joeflyer
For each jug in question, pour a small amount into a glass jar and set it out in the sun. If oil has been added you should see an oily residue left in the jar after the kero evaporate.
Actually, if its turbine oil. put the glass jar in the sun and if it turns darker, its got oil in it.
Personally, I make it a rule to *never* fill a jug with kero unless I put oil in the jug *first*. That way I don't have senior moments about whether or not its got oil in it.