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 _______________________________________ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
