octane number and misc.

["david utecht" <stealthloader@xxxxxxxxxxxx>]

  Out here in the mid-west, New Mexico, we have a choice of 85, 88 or 90 at
most places with 91 being the highest in my area.  My 94 Dodge Dakota runs
the same compression and I use the 90 with all of the performance mods I
have done and at 4,300 feet of altitude it works just fine.  No knocking or
pinging at all even when loaded with a 3,500lb. trailer and the A/C on.

Dave U.
81 Imp
94 Dakota (my baby)
02 Stratus (wife's)

-----Original Message-----
From: mailing-list-owner@xxxxxxxxxxxxxxxx
[mailto:mailing-list-owner@xxxxxxxxxxxxxxxx]On Behalf Of Philippe
Courant
Sent: Sunday, June 29, 2003 12:04 PM
To: mailing-list@xxxxxxxxxxxxxxxx
Subject: IML: octane number and misc.


Hi,
i just wonder what are the different octane number gazolines you have in
USA ? I know that the US octane number is different than french (RON)
number and seems to be (RON + MON) / 2, so a 98 RON (= 88 MON) would be
a 93 .
At this time i run my '57 Imp with unleaded 98 RON (so 93 for you) and i
want to switch to 95 RON ( = 90 US gazoline, don't know if it exists..).
My compression ratio is 9.25/1 so what is your advises ?
I've found a table in the middle of
 http://www.faqs.org/faqs/autos/gasoline-faq/part3/  (paragraph 7-2) but
i don't know if the "octane number requirement" means US or another
octane number.

--

Philippe COURANT (Pau, France)- Webmaster des sites ACCF et C-I-F
Imperial 1957 Crown convertible
Buick 1996 Roadmaster wagon

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