What percentage of ethanol is added to the gas?

Claire Staffieri | Oct 15, 2019 | Category: Gas station

Costco Gas Station - All questions

Address: 100 Veterans Way, Warminster, PA 18974, USA

Ronald Roth | Oct 15, 2019

10% By law

S. R. | Oct 15, 2019

I think 10%, due to federal law.. https://www.costco.com/gasoline-q-and-a.html

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