super unleadedn.adj.
/ˌsuːpər ʌnˈlɛdᵻd/, /ˌsjuːpər ʌnˈlɛdᵻd/, U.S. /ˈˌsupər ˌənˈlɛdəd/ A. n.
A grade of unleaded petrol with an octane rating higher than that of ordinary unleaded petrol, achieved by the addition of aromatic hydrocarbons.
ΘΚΠ
society > occupation and work > materials > fuel > chemical fuel > [noun] > liquid
naphthec1384
naphtha1543
paraffin1851
kerosene1854
octylene1857
shale-oil1857
coal oil1859
gasoline1863
octane1867
octene1868
octyne1877
gas1878
liquid fuel1889
petrol1895
mazut1897
white fuel1901
diesel oil1905
autogas1908
juice1909
sauce1918
power kerosene1919
petroil1921
ethyl1923
lox1923
kero1930
isooctane1932
high-octane1933
hi-octane1933
Calor1936
pool petrol1939
super1939
pool1940
derv1948
platformate1949
mixture1952
diesel1953
Mapp gas1962
gasohol1971
super unleaded1975
synoil1976
synjet1979
biodiesel1986
Orimulsion1987
1975 New York Times 9 Apr. 52/3 Two unleaded gasolines with higher than 91 octane ratings are now available: Amoco's premium with a 100 rating, and Shell's super unleaded, rated about 94.
1979 Oil & Gas Jrnl. 16 Apr. 40 Shell this month will try to take the pressure off its super unleaded by offering..a second, lower octane unleaded product.
1987 A. Wimbey & E. L. Jenkins Analyze Organize Write (rev. ed.) iv. 82 Went to Exxon for gas, self-service pump broken, full-service pump was $1.54 for super unleaded.
2006 SuperBike June 91/1 (heading) We've all heard 'em, biking's clichés—loud pipes save lives, super unleaded makes your bike faster... Are they true or just a load of old cock?
B. adj.
Designating or relating to fuel of this grade.
ΘΚΠ
society > occupation and work > materials > fuel > chemical fuel > [adjective] > properties or characteristics
premium1856
three-star1879
naphthous1885
paraffiny1902
propellant1919
pro-knock1927
high-octane1931
hi-octane1934
unleaded1934
monopropellant1949
nonleaded1955
super unleaded1978
1978 Wall St. Jrnl. 9 Aug. 8/2 Mobil Corp...announced that by early November it would be selling a new ‘super’ unleaded premium gasoline.
1990 G. G. Liddy Monkey Handlers xviii. 298 Michael Stone slid the Mustang up to the superunleaded pump at Buckley's Texaco.
1998 Economist 21 Mar. 41/2 Duties on cleaner fuels have been cut or frozen, while there are increased duties on super-unleaded petrol and diesel, both of which contain known carcinogens.
2007 Intelligencer (Doylestown, Pa.) 28 Oct. 7/5 For the best performance, premium fuel should be used in the V-6 engine and superunleaded gas in the four-cylinder model.
This entry has been updated (OED Third Edition, June 2012; most recently modified version published online March 2022).
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n.adj.1975