>
> Mercury Marine's 89 octane recommendation is a manufacturer's
>recommendation, yes? When the manufacturer specifies an octane
>rating, by all means use that as a minimum. My Volvo Penta stern
>drive needs 93 octane, so that's what I run.
>
This is not always true. I saw a review of the new Infiniti SUV on Motor
Trend TV. Infiniti designed the SUV to run on low grade fuel (either 87 or
89 don't remember which). They specifically said not to use premium fuel.
The point is that engines are designed to use a certain grade fuel. If the
manual says use a minimum grade of 87 or 89, then it can be assumed that it
is okay to use a higher grade. However, if the manual states a specific
grade without denoting it as a minimum, then you can't assume it is a
minimum recommendation.
Andy
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
Andy Callahan University of Kentucky quasideedle@uky.campus.mci.net
'97, black/mist gray, 4x2, Sport, club cab, 3.55 SG, 5-speed, Tire &
Handling Package, all the little goodies
Mods: Firestone Firehawk SS10 275/60/15's, GT Classic steel tonneau
cover, "Super Sucker" FIPK by Air Meldrum, CC bed mat
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
This archive was generated by hypermail 2b29 : Fri Jun 20 2003 - 12:07:55 EDT