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First you have to define which "feedstocks" you are referring to. About 20% of what they call "petroleum liquids" is natural gas liquids (NGL). Refinery feed is mostly crude oil and condensate, and that type of "petroleum liquids" is what is used to make diesel, gasoline and kerosene. A small portion is used as asphalt. This stream has hit a quarterly peak a few years ago, and has been fairly flat (except 2020). NGL is increasing, and roughly 50% is used for chemical feedstocks. Another stream is sold as propane and butane in pressurized containers. The condensate and NGL streams have been increasing as natural gas production increases, but as I mentioned most NGL aren't used to make refined products. Condensate has a wide density range, and some of it is so light that US refineries can't use it profitably. This light stream is blended with light oil being produced by the fractured shales and exported. So as you can see this issue gets complicated, the data is hard to find. And one more point: oil companies aren't interested in disclosing the fact that the crude oil stream is depleting gradually which explains why they like to use terms such as petroleum liquids when they report production. Simultaneously we see outfits like the International Energy Agency emphasize the climate change issue, which means they also mix streams. As I wrote before, I think it's important to clear this up.

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As an FYI, one of the aforementioned NGLs is LPG (liquid petroleum gas) or propane. Almost entirely due to fracking, this country exports roughly 1 million barrels per day of propane. Total crude oil runs to refineries is about 18 - 19 million barrels per day.

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