what diffusion is in chemestry
is when a solvent dissolves into another fluid
the process of the molecules of the solvent  
moving throughout the medium of a fluid is what is called diffusion
this is lacquer thinner
that has been used to clean out a fuel tank
that was contaminated with lacquer
and to it I am going to add 100 Millileters of acetone
so that we can see if acetone will force 
lacquer out of solution with the lacquer thinner
and we can see diffusion at work
with this next series of experiments
I hope to demonstrate diffusion
and diffusion is
the principle of how a sollvent moves through a fluid medium
and I what I would like to show
is that aggitation really is not required
to get the solvent to move through the waste oil to thin it
and the advantage of
not aggitating the blend
is primarily we do not want to disturb
the particles that have already begun to precipitate out
and by using the principle of diffusion
the solvent as it moves through the medium
will actually propel those particles out of solution
as long as we are not aggitating our solution
the other thing I hope to show
in this series of experiments
is that once the solvent, such as gasoline,
has gone into solution with the waste oil
such as vegetable oil and motor oil
is that the solvent will not come back out of solution
the only way to separate those 2 fluids 
is through fractional distillation to separate them
so what we are going to now do
this is rouhgly 1 quart or 1 litter
of waste vegetable oil
that I just collected today
and I am going to add to it
roughly 200 millileters of gasoline 
and this container here
contains rouhgly 1 quart or 1 litter of waste motor oil
and it has actually been sitting around for months
but it is still pretty thick
and I am going to add again 200 millileters of gasoline to it
and we will attempt to observe diffusion in action
and we will not see much in the motor oil experiment
except for one thing
we should see that the gasoline is not floating on top of the motor oil
but it has actually gone into solution with it
in the case of the vegetable oil
we should be able to see the gasoline diffuse through the medium
and not come floating to the top
and then what we will do is let these two samples sit aournd for a day
and we will look at them after 24 hours
and then we will look at them after a week
to see if the gasoline has separated and floated to the top
or if it remains a uniform solution
and then at the end of that week we will pour off
the waste motor oil blend and we will be looking for whatever precipitated out of solution
and we may actually see some precipitates at the bottom of the waste vegetable oil as well
I am now pouring 200 millileteres of gasoline into roughly 1 liter of waste vegetable oil
well, they seem to have gone one into the other and I have not even seen
any turbulance of one fluid against the other, they are now uniform
this is 1 liter of waste motor oil
to which I am going to add 200 millileteres of gasoline
I see no emulsion layer and it looks as though
the fluids have gone right into each other
but we will give it a moment to see if any separation takes place
there is still no separation of the 2 fluids
so we can conclude that gasoline went right into solution with the waste motor oil
and they did not separate, but we will look at the sample in 24 hours to see if any separation has taken place
this is a sample of waste motor oil at 80% blended with gasoline at 20%
the sample was not agitated
the gasoline went directly into solution 24 hours ago
the sample has been sitting here unmoved for 24 hours
and we see no separation of the gasoline from the motor oil
this is a sample of waste vegetable oil that had been blended at 80% with gasoline at 20%
and it has sat undisturbed for 24 hours
and there is no sign of the gasoline separating from the vegetable oil
this is a sample of waste motor oil that I added gasoline to at 20%
and I left it sit for a week
and as we can see there is no emulsion layer forming
which means the gasoline is not floating on top nor has the gasoline or waste motor oil separated
this is a sample of waste vegetable oil to which I added gasoline at 20% about a week ago
and as we can see no emulsion layer has formed
which means that the gasoline and the vegetable oil have not separated 
and it did not require agitation to force the gasoline into solution
with the vegetable oil.  They just went into solution and they have nto separated
this is a sample of new motor oil that was blended at 80% with gasoline at 20%
about 6 months ago
the sample has sat on the self in my workshop that whole time
the gasoline and motor oil blend was never agitate
and there is no sign of a separation of the two fluids
in that there is no emulsion layer formed to indicate that the two fluids have separated
this is a smaple of new canola oil blended at 80% with gasoline at 20%
the sample was made 6 months ago without agitation and it has sat on my shelf
for the duration of the 6 months with no indication of the gasoline and vegetable oil separating
as there no formation of an emulsion layer
this experiment should allow us to conlcude
that at no time does gasoline ever float on top of any oil
it will dissolve emediately into the oil without aggitation
and it will remain in that oil until it is separated through fractional distillation
anyone who claims that gasoline floats on top of waste motor oil or waste vegetable oil
has to either be in error, unable to be a reliable observer of reality
or, may have an agenda to discourage people from blending
possibly because that individual makes a living either with
selling products and services for biodiesel or for two-tank SVO systems
