Mich. Admin. Code R. 285.564.2 - Permissible oxygen content in gasoline; gasoline clarity
Rule 2.
(1) The
calculated oxygen content permitted in any gasoline sample shall not exceed
3.7% by weight. The percentage of oxygen by weight shall be calculated on the
basis of the oxygenate added per 1% volume, without regard to the actual
gravity of the finished gasoline, as listed in the following table:
Table 1
| Oxygenate added | Percentage by Weight of oxygen per 1% volume oxygenate |
| Methanol | .53% |
| Ethanol | .37% |
| Tertiary butyl alcohol | .23% |
The following are examples of calculated oxygen equivalents:
(a) Gasoline having 10%
by volume ethanol. Oxygen by weight: 10 x .37 =3.7%.
(b) Gasoline having 4 1/2% by volume methanol
and 4 1/2% by volume tertiary butyl alcohol. Oxygen by weight: 4.5 x .53 + 4.5
x .23 = 3.4%.
(c) The department
shall provide oxygen equivalents for oxygenates not listed in table 1 upon
request, which shall be based upon gasoline with a specific gravity of .7412
(6.17 pounds per gallon) at 60 degrees Fahrenheit.
(d) There shall not be intentional addition
of methyl tertiary butyl ether (MTBE) to the gasoline.
(2) Gasoline shall be visually free of
undissolved water, sediment, and suspended matter. It shall be clear and bright
at the ambient temperature or 70 degrees Fahrenheit (21 degrees Celsius),
whichever is higher.
(3) The
finished fuel shall be free of an adulterant or contaminant that may render the
fuel unacceptable for its commonly used applications.
(4) Ethanol blended with gasoline shall meet
ASTM D 4806-07 (2007).
(5) Gasoline
used for blending with ethanol shall meet ASTM D 4814-08b (2008) and the
finished blend may have a 3-degree variation from the 105ºF requirements,
a 10-degree variation from 116ºF requirements, and an 8-degree variation
from the 124º requirements listed in R 285.564. 4 (h) provided both of the
following:
(a) The gasoline used for blending
with ethanol, after the time it met ASTM D4814-08b (2008), was not modified or
altered in any way prior to or at the time of addition of ethanol.
(b) The finished blend contains between 9%
and 10% ethanol by volume.
Notes
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