[W126 Coupe] Fuel Requirements or How Can IAdjust1989 560 SECToUse 87 Octane

[Richard Hogarth]

With respect to ignition timing and gas mileage, as the timing chain
stretches with wear,  the engine should be able to accommodate a little more
spark advance as a compensation. 
-RPH

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From: mbcoupes-bounces at mbcoupes.com [mailto:mbcoupes-bounces at mbcoupes.com]
On Behalf Of Shayegan, Richard
Sent: Friday, April 28, 2006 10:05 AM
To: Mercedes Coupes Mailing Lists
Subject: RE: [W126 Coupe] Fuel Requirements or How Can IAdjust1989 560
SECToUse 87 Octane


I thought the 420 is also a 116...116.965 or something like that, no? Either
way, yeah pre-86 don't have EZL (I know that, it's not from deciphering the
service manual). 380 runs 0 degrees at idle too, so there should be room for
a good amount of advancement, especially with 93 octane since the car only
calls for 87.
Richard

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From: mbcoupes-bounces at mbcoupes.com [mailto:mbcoupes-bounces at mbcoupes.com]
On Behalf Of Dan Landiss
Sent: Friday, April 28, 2006 9:56 AM
To: Mercedes Coupes Mailing Lists
Subject: Re: [W126 Coupe] Fuel Requirements or How Can I Adjust1989 560
SECToUse 87 Octane


Shayegan, Richard wrote: 

Ah, well, pre-86 doesn't have EZL so I guess my only option is to just
rotate the distributor.


That is how I understand the instructions on the maintenance CD. The pre-86
stuff seems to be under the 116 model, not 117.


-- 



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"Progress is brought about by doubt, not accord."  --John Amos Comenius,
17th century educator

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