Quote:
Originally Posted by Too Tall
Gas is gas. Everyone makes it the same way and it goes in the same pipeline. The ethanol is added at the terminals along with that brands additive package.
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Yes......and......No
True all gasoline is about the same....but not exactly the same.
Gasoline is a blend of several [about 4 to 6, if I remember correctly] different products made at a refinery.
How the blend is made is based on the chemical testing of each of the component at the time the products were produced. When the blend is made.....product is pumped from several different tanks at one time and pumped into the pipeline. Each product shipped into the pipeline is only seperated by a "pig" [round ball] so there is some cross mixing of different batches of products shipped through the pipeline.
With this process......every batch [maybe a 2 to 4 million gallons] is slightly different. When I worked at a refinery many years ago.....everything was added at the refinery. If a blend was off spec. [octane, vapor pressure, color, etc], a doctored blend was added to the storeage tank and retesting done before shipping the product to distributers. This would happen about every couple of months.