While I don't know how to give "proof", you can verify with any spatco or similar company worker. Walmart that sell ethanol free gas is a great example. In may the heat increases volume of gasoline, thereby reducing amount of potential power per gallon. To adjust for this, Walmart changes their blends on 89 to 70% ethanol free, 30% 87. Buy 89 gas from may till October.
Sounds technical.
SPC?
Audit much? As in ISO?
Just curious.
I have friends that work in the industry and have explained it in detail. It's a standards and measurements regulation requirement of some sort. Next time you see a guy working on a gas pump ask him about it. Or Google it I'm sure the info exists out there
It's statistical process control. Sounds like.
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