Subject: Is gasoline considered a homogeneous mixture or heterogeneous mixture?

I am a teacher and this question was asked of me when we were discussing 
mixtures.  I think the answer depends on what type of gasoline you are 
referring to.  If gasoline is considered an emulsion, than it would be 
heterogeneous.  If it is considered a "pure" solution, than it would be 
homogeneous.  If its hetereogeneous, then how could all of our cars run on it?  
We would have to clean out our gas tanks....Would appreciate any input.

Re: Is gasoline considered a homogeneous mixture or heterogeneous mixture?