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This may or may not be relevant, but in my days of racing motorcycles  
I learned the hard way that you put the oil in the can before adding  
the gas for my two-stroke roadracers. Regardless how much you shook  
the can after adding oil to gas you'd still not get a homogenous mix.  
The end result would be partial and sometimes complete seizures. Not  
a serious matter until you get flipped off a bike at 140. This was  
and still remains a "rule of thumb" for anyone using two-strokes. How  
many of you out there do your boat motor fuel this way? 

I think cases of "stratification" are more a case of poor mixing  
rather than any real gradient in the gases. Over time it would seem  
that brownian movement would force the gases to a homogenous mix if  
all else fails. Else all my chemistry lessons were for naught!
Anybody have a similiar incident to Jim Greenlee's where they just
set the tank aside for a while to see if it mixed by itself? Or is  
everybody in too much of a hurry to get wet to do this?

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