by pup55 » Wed 23 Apr 2008, 23:33:40
$this->bbcode_second_pass_quote('', 'G')ap -0.2728
This is just the unleaded price minus the heating oil price. Somewhere in this thread I posted a historical chart of this to the effect that for a long time, it was hardly ever negative, which is to say, the unleaded price was almost always higher. Not now, though.
Ref Margin 15.8640 $/bbl
I take the heating oil price in $/gal times 42 to convert to $/barrel, and multiply by .43.
Then, the unleaded price in $/gal times 42 to convert to $/bbl, and then multiply by .57
Then add the two products above together, which is the weighted average price of the products. Then, subtract the crude oil price from this sum, to get the refining margin, in $/bbl. It's the profit that the refiners make on an average product mix.
Ref Margin 0.3777 Cents/Gal
This is just the above, divided by 42 again, to get margin in cents per gallon.
57/43 is approximately the production ratio of unleaded to heating oil for the US refineries. Yes, I am well aware that there are other products, such as propane and jet fuel that come from this mix, but this is just a rough estimate for comparison from week to week. As it turns out, it is actually within a dollar or so of VLO and TSO's actual refinery margin under normal circumstances, so close enough for the purposes of some forum on the internet.
Of course, the actual refinery margin has to be computed on a unit-by-unit basis, using the actual feedstock price (which might not be the same as the WTI price) and the actual product mix that the unit is producing. So each of these companies knows this calculation, and it's a little different for each refinery.
That's why FTO is able to have $20 refinery margins at the same time VLO has only $12 because they can buy cheaper feedstock and can refine it into California gas which has an even higher selling price.