Posted for Jarrett & Heidi Johnson <hjjohnson@sasktel.net>:

I would hazard a guess that it doesn't come out of solution, and secondly
even if it did, our a/c aren't so big that a brisk shake at the wing tip
wouldn't re-mix it. It'd be no different than taking your boat tank and giving
it a shake to make sure the oil is mixed back in. Plus, the effect of adding
fuel would contribute to the remixing of the oil I would think.

Curious to see what Marv turns up w/ his experiment..

Jarrett Johnson
235/320 55%


[I didn't even notice that I chopped off the final bit of my embedded reply.  Anyway, what it said was that I would let the bottle chill for several hours and report back the results.  Well, several hours have passed, the temperature of the bottle's contents has equalized with its surroundings (ah, the wonders of thermodynamics), verified at 10dF, and when inspected was exactly as expected... there was no stratification of any kind visible.  The solution had remained just that, which should dispel any doubts folks may have about 2-stroke oil falling out of solution due to low ambient temps.  (Just for grins I'm going to leave the bottle in the freezer overnight... JIC it takes longer to get the job done.  I can't imagine that the results will be any different, but we shall see.)  Since this single test may not conclusively prove to some folks that we are, in fact, dealing with a true solution, I'm going to perform another one.  I'm going to fill another bottle with raw gasoline and then gently add a slug of 2-stroke oil, with the intention of getting the 2-stroke to make its way all the way to the bottom of the container and start us off with a stratified pair of liquid components.  One of the rules about solutions says that their mixture is, in fact, homogeneous.  In order for it to become that when starting out with two visible separate and stratified components, the laws of diffusion should turn them into a homogeneous mixture without agitation.   I suspect this test may take longer than a couple hours so tomorrow afternoon I'll take a look and see if diffusion has done its thing and provided us with the homogeneous mixture of a solution.  Fun stuff. If we'd done these things back in HS chemistry we wouldn't have to be doing them today... I guess this proves that education is an ongoing process <g>.   <marv>   ]