Mich. Admin. Code R. 285.564.7 - Antiknock index standard
Rule 7.
(1) All
uniform grades of automotive gasoline shall meet the following specified
standards for antiknock index (octane):
(a)
Subregular: not less than 85.0 AKI.
(b) Regular: not less than 87.0 AKI and not
less than 82.0 MON.
(c) Midgrade
88: not less than 88.0 AKI and not less than 82.0 MON.
(d) Midgrade 89: not less than 89.0 AKI and
not less than 83.0 MON.
(e)
Premium: not less than 90.0 AKI.
(f) Premium 91: not less than 91.0
AKI.
(g) Premium 92: not less than
92.0 AKI.
(h) Premium 93: not less
than 93.0 AKI.
(i) Premium 94: not
less than 94.0 AKI.
(2)
The test method for antiknock index shall be ASTM standard D 2700-08 (2008) for
a motor engine and ASTM standard D 2699-08 (2008) for a research
engine.
(3) The formula for
determination of the antiknock index shall be AKI =(RON + MON) / 2.
Notes
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