[American Constitutionalist]

So basically about 20 gallons of that crude is able to produce regular gasoline ? and to top that off to make it more costly they add in there some kind of blends therefore use up more crude ?

[thackney]

So basically about 20 gallons of that crude is able to produce regular gasoline ?

Yes, but the rest isn't waste. The other products have value as well.

and to top that off to make it more costly they add in there some kind of blends therefore use up more crude ?

Don't think of it as first making gasoline then using more energy to change that. It is more a case of making a variety of gasoline blending components to start with, then mixing the ingredients in the proportions to match different requirements.