IIRC, you won't get full/optimum performance on lower octane fuel, but the computer will retard the timing to prevent blowing up the engine.
On Sat, Jul 8, 2023 at 1:35 PM 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 > _______________________________________ > 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 > > -- OK Don "Quality of life is inversely proportional to the amount of clothing you are wearing." "Whenever you find yourself on the side of the majority, it is time to pause and reflect." Mark Twain “Basic research is what I’m doing when I don’t know what I am doing.” Werner Von Braun "In science if you know what you are doing you should not be doing it. In engineering if you do not know what you are doing you should not be doing it." -- Richard W. Hamming, The Art of Doing Science and Engineering 2013 F150, 18 mpg 2017 Subaru Legacy, 30 mpg 1957 C182A, 12 mpg - but at 150 mph! _______________________________________ 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
