In a message to ALL about Weird octane, uunet!hostel.lincroftnj.n
wrote:
u>put in $5 of Amoco 93. Guess what ????? - I runs a lot better than
u>with Sunoco 94, and pings a lot less under load.
u>Soooo...... does this mean that Amoco 93 has a higher octane rating
u>than Sunoco 94 ?
u>I am confused !!!!!!!!
The methods for determining the octane rating are standardized so a
given octane is the same in any brand. Gasoline is blended from a
variety of feedstocks and the octane rating is tightly controlled since
a shift of one octane point equates to a lot of dollars of profit.
However, occasionally a batch will be shipped that is over spec for one
reason or another. This is not done frequently but it does happen.
Gasoline that comes in below spec is shipped as the next lower grade.
Consequently the Octane rating on the pump is the *minimum* octane for
that grade and the actual octane may, on rare occasion, be higher than
what is listed.
Sunoco Ultra is always at least 94 Octane while Amoco Premium is usually
93. It would seem that your Amoco dealer got a batch of slightly
overspec material.
- joe -
11/29/94 internet> joe.fitzpatrick@compudata.com
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Internet: joe.fitzpatrick@compudata.com (Joe Fitzpatrick)
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