Does the M103 have a knock sensor? I didn't think they did. Mine pings big time with 87.
Tony Wirtel > -----Original Message----- > From: Donald Snook <dsn...@mtsqh.com> > Date: Tuesday, Dec 30, 2008 11:54 am > Subject: [MBZ] Premium v. Regular was Re: Fuel prices > To: 'Mercedes Discussion List' <mercedes@okiebenz.com>Reply-To: Mercedes > Discussion List <mercedes@okiebenz.com> > > Andrew wrote: "Do you require premium or regular gas?" > > > >That is up in the air right now. The manual says premium, the fuel > cap/door say premium. But, I have asked a few others that have this car and > some of them say it needs premium and others say it is a waste of money. I > have not noticed any difference in mileage or performance when using 87 > octane. I was concerned that it might "ping" but it has not. I don't know > what to think, so I have been putting in 91 (premium) about every other > tank. > > > >I talked to one of the techs at the dealership I worked at and he said > that if the octane is too low and it starts to ping, the knock sensor will > catch it and it will retard the timing slightly to compensate for it. So, > it is possible that I might have less power with 87 than with 91. I don't > really know what to think. In the past (especially in my 90 300SEL), I > thought I could tell a difference when I put in 87 rather than 91. Maybe I > was just imagining it. > > > > > >Donald H. Snook -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://okiebenz.com/pipermail/mercedes_okiebenz.com/attachments/20081230/5fc9e10d/attachment.html> _______________________________________ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
