I am not  & my friend isn't either

On Sat, Jul 8, 2023, 4:10 PM Allan Streib <astr...@fastmail.fm> wrote:

> Are you at a high elevation? I remember visiting Boulder CO years ago and
> I vaguely recall the gas sold was between 85 and 89 octane?
>
> If 89 is the best you have I guess that makes the decision for you, unless
> you want to look into using "octane-booster" additives.
>
>
> On Sat, Jul 8, 2023, at 14:03, Dwight Giles via Mercedes wrote:
> > I used to use 91 in my 2005 E320 but no longer available here so I have
> > used 89.
> >
> > On Sat, Jul 8, 2023, 3:00 PM dan penoff.com via Mercedes <
> > mercedes@okiebenz.com> wrote:
> >
> >> I don’t see it any differently than the same car being run on 87. I
> >> wouldn’t advise doing it long term, but as long as you’re not mashing
> the
> >> throttle all the time or running at high speeds or under heavy loads.
> >>
> >> The ECU would compensate for any difference in fuel quality, I would
> >> expect.
> >>
> >> Not sure why they would bother with 89 unless they can’t get 91 at all.
> >> The cost difference is marginal.
> >>
> >> -D
> >>
> >> > On Jul 8, 2023, at 11:35 AM, Allan Streib via Mercedes <
> >> mercedes@okiebenz.com> wrote:
> >> >
> >> > Well honestly I don't know. Would a tank or two of 89 hurt anything,
> >> probably not. In a modern car the computer should compensate. But why
> did
> >> MB specify 91 if they didn't think it was necessary. That is my view.
> >> >
> >> >
> >> >> On Sat, Jul 8, 2023, at 13:30, Dwight Giles wrote:
> >> >> tell me more
> >> >>
> >> >>> On Sat, Jul 8, 2023, 2:28 PM Allan Streib <astr...@fastmail.fm>
> wrote:
> >> >>> No
> >> >>>
> >> >>> On Sat, Jul 8, 2023, at 13:08, Dwight Giles via Mercedes wrote:
> >> >>>> A friend is buying a 2015 E350. 91 Octane is specified. Can he run
> 89
> >> in it
> >> >>>> with no problems?
> >> >>>> TIA
> >> >>>> Dwight
>
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