Editing Amoco (section)

=== Lead-free gasoline ===
[[File:1935 - Amoco Station 9th and Walnut Streets.jpg|thumb|Amoco gas station in Pennsylvania, 1935]]
While most oil companies were switching to leaded [[gasoline]]s en masse during the mid-to-late 1920s, American Oil chose to continue marketing its premium-grade "Amoco-Gas" (later Amoco Super-Premium)<ref name=":6">{{Cite journal |last=Oudijk |first=Gil |date=March 17, 2010 |title=The Rise and Fall of Organometallic Additives in Automotive Gasoline |url=https://www.researchgate.net/publication/249050811 |journal=Environmental Forensics |volume=17 |issue=1 |pages=17–49 |doi=10.1080/15275920903346794 |bibcode=2010EnvFo..11...17O |via=Research Gate}}</ref> as a lead-free gasoline by using aromatics rather than [[tetraethyllead]] to increase [[octane]] levels. This was decades before the environmental movement of the early 1970s that led to more stringent auto-emission controls, which ultimately mandated the [[tetraethyllead#Phaseout and ban|universal phase out of leaded gasoline]].<ref>{{Cite web |last=PrintMag |date=2010-07-28 |title=BP: Branding Petroleum |url=https://www.printmag.com/daily-heller/bp-2b-branding-problem/ |access-date=2024-10-24 |website=PRINT Magazine |language=en-US}}</ref> 

The "Amoco" lead-free gasoline was sold at American's stations in the eastern and southern U.S. alongside American Regular gasoline, which was a leaded fuel. By 1970, lead-free Amoco was introduced in the Indiana Standard marketing area in 1970.<ref name=":6" /><ref>{{cite news|url=https://news.google.com/newspapers?nid=1368&dat=19770510&id=38UVAAAAIBAJ&pg=2435,1651315 |title=Introducing Amoco Premium Lead-Free |newspaper=The Milwaukee Sentinel |date=1977-05-10 |access-date=2010-06-02}}</ref> The Red Crown Regular and White Crown Premium (later Gold Crown Super Premium) gasolines marketed by parent company Standard Oil (Indiana) in its prime marketing area in the Midwest before 1961, also contained lead.<ref>{{Cite book |last=Henderson |first=Scott Benjamin Wayne |url=https://books.google.com/books?id=R4CnIcaH6YAC&dq=standard+++%22gold+crown%22+++premium&pg=PA62 |title=Gas Pump Collector's Guide |publisher=Voyageur Press |isbn=978-1-61060-635-6 |language=en}}</ref> By 1978, Amoco had phased out premium lead gas.<ref name=":6" /> 

In November 1986, amid pressures from the [[United States Environmental Protection Agency|EPA]] to cut down on the usage of lead in gasoline, Amoco became the first major oil company to say it would quit all retail sales of leaded gasoline. In its place, Amoco began selling a mid-grade 89 octane unleaded gasoline (the same number as its leaded regular gasoline), along with its unleaded regular and unleaded premium offerings.<ref>{{Cite web |last=Tribune |first=Chicago |date=1987-06-15 |title=LEADED FUEL RUNNING OUT OF GAS |url=https://www.chicagotribune.com/1987/06/15/leaded-fuel-running-out-of-gas/ |access-date=2024-10-24 |website=Chicago Tribune |language=en-US}}</ref>