What kind of Octane do you put in your C-Class?
#201
MBWorld Fanatic!
Join Date: Jun 2003
Location: San Diego, CA & San Jose, Costa Rica & Stuttgart, Germany
Posts: 9,498
Likes: 0
Received 3 Likes
on
3 Posts
1959 220S / 1979 230 G / 2002 A210 AMG / 2003 C320 SC / 2004.5 C320 SS / 2005 ML350 SE / 2008 smart
Originally Posted by Outland
C230_617 has returned...where is Jim Banville when you need him.
Originally Posted by from190e_cs
If you have 3 people helping you there is no need to remove the bumper right ? Is it really that nessasary ?
#204
MBWorld Fanatic!
Join Date: Jun 2003
Location: San Diego, CA & San Jose, Costa Rica & Stuttgart, Germany
Posts: 9,498
Likes: 0
Received 3 Likes
on
3 Posts
1959 220S / 1979 230 G / 2002 A210 AMG / 2003 C320 SC / 2004.5 C320 SS / 2005 ML350 SE / 2008 smart
he could.... i don't think he cares though...
he's got about another 3 or 4 aliases running on MBWorld as we speak.
He accumulates posts (in CLK, off topic, etc... threads) to make himself look legit, but in time the brain damage kicks in, and he exposes himself without even trying. Pathetic loser.
he's got about another 3 or 4 aliases running on MBWorld as we speak.
He accumulates posts (in CLK, off topic, etc... threads) to make himself look legit, but in time the brain damage kicks in, and he exposes himself without even trying. Pathetic loser.
#205
Super Moderator
![](https://staticssl.ibsrv.net/autocomm/Content/MB/mbwambassador2.gif)
Originally Posted by from190e_cs
Yeah Im from the 617. But who is c230_617 ?
![thumbs](https://mbworld.org/forums/images/smilies/thumbsup.gif)
#207
MBWorld Fanatic!
Join Date: Jun 2003
Location: San Diego, CA & San Jose, Costa Rica & Stuttgart, Germany
Posts: 9,498
Likes: 0
Received 3 Likes
on
3 Posts
1959 220S / 1979 230 G / 2002 A210 AMG / 2003 C320 SC / 2004.5 C320 SS / 2005 ML350 SE / 2008 smart
Originally Posted by from190e_cs
Yeah Im from the 617. But who is c230_617 ?
Originally Posted by from190e_cs
**** in my Mazda, foo
Originally Posted by from190e_cs
CLK55 whips in Delaware
Originally Posted by nlpamg
Smart, too bad almost all of the people that are subscribed to this thread got it before you had a chance to edit it out. Thanks for admitting it. If you don't know who c230_617 is, then why did you delete your previous thread about stickers?
Including your "Duplicate Thread" of JimBanville's carbon fiber sticky interior ?
Originally Posted by from190e_cs
Man this thread is off topic. Please focus on the topics not other nonsense about who is who. WHO CARES.
![nix](https://mbworld.org/forums/images/smilies/nixweiss.gif)
do us all a favor and delete this one too !!
Last edited by Saprissa; 06-22-2005 at 02:24 AM.
#208
Super Moderator
![](https://staticssl.ibsrv.net/autocomm/Content/MB/mbwambassador2.gif)
Originally Posted by Saprissa
why do you delete all your threads ?
Including your "Duplicate Thread" of JimBanville's carbon fiber sticky interior ?
hmmmm, where have I heard that exact complaint before ???![nix](https://mbworld.org/forums/images/smilies/nixweiss.gif)
do us all a favor and delete this one too !!
Including your "Duplicate Thread" of JimBanville's carbon fiber sticky interior ?
hmmmm, where have I heard that exact complaint before ???
![nix](https://mbworld.org/forums/images/smilies/nixweiss.gif)
do us all a favor and delete this one too !!
![word](https://mbworld.org/forums/images/smilies/werd.gif)
![word](https://mbworld.org/forums/images/smilies/werd.gif)
dude, you've been banned at least 20 times already and yet you still keep coming back. can't you tell or see that you're clearly not wanted? get your ghetto *** out of here.
#209
Member
Join Date: Sep 2004
Location: Earth
Posts: 242
Likes: 0
Received 0 Likes
on
0 Posts
W208 CLK320 & E39 M5
Originally Posted by Saprissa
I've NEVER heard of gasoline octane rating coming in an even number: "94"
![crazy](https://mbworld.org/forums/images/smilies/crazy.gif)
or is that just odd in California ?
![nix](https://mbworld.org/forums/images/smilies/nixweiss.gif)
![crazy](https://mbworld.org/forums/images/smilies/crazy.gif)
or is that just odd in California ?
#210
MBWorld Fanatic!
Join Date: Jun 2003
Location: San Diego, CA & San Jose, Costa Rica & Stuttgart, Germany
Posts: 9,498
Likes: 0
Received 3 Likes
on
3 Posts
1959 220S / 1979 230 G / 2002 A210 AMG / 2003 C320 SC / 2004.5 C320 SS / 2005 ML350 SE / 2008 smart
that really sucks. I would use 93 or 94 if available.
Would have RENNtech reprogram my ECU accordingly.
I do know that there are some UNOCAL or UNION 76, or whatever they're called nowadays, that sell some really high octane up in Los Angeles. It was in the high 90's (97/98)
Would have RENNtech reprogram my ECU accordingly.
I do know that there are some UNOCAL or UNION 76, or whatever they're called nowadays, that sell some really high octane up in Los Angeles. It was in the high 90's (97/98)
![nix](https://mbworld.org/forums/images/smilies/nixweiss.gif)
#215
Here in Jersey, especially around the Shore, older muscle cars are very popular. Lots of guys run CAM 2, ie. Sunoco Race Fuel. I don't think it would be good for the imports though.
"Cam 2" is the generic name used for Sunoco Race Fuels. You can expect the same consistent high quality performance from Cam 2 Racing Gasoline that you get from Sunoco Race Fuels because the names are interchangeable. It is the same product, made in the same facility by the same people. We use this name wherever the "Sunoco" brand name cannot be used, such as gasoline outlets which carry a competing brand of street gasoline. Cam 2 is available in 110, 112, and 116 octane leaded, and 100 and 104 unleaded.
"Cam 2" is the generic name used for Sunoco Race Fuels. You can expect the same consistent high quality performance from Cam 2 Racing Gasoline that you get from Sunoco Race Fuels because the names are interchangeable. It is the same product, made in the same facility by the same people. We use this name wherever the "Sunoco" brand name cannot be used, such as gasoline outlets which carry a competing brand of street gasoline. Cam 2 is available in 110, 112, and 116 octane leaded, and 100 and 104 unleaded.
![](http://www.bazellracefuels.com/images/Cam2_2c.jpg)
#216
MBWorld Fanatic!
Originally Posted by straightSIX
Using low octane gas causes premature cat failure.
#217
MBWorld Fanatic!
Join Date: Aug 2002
Location: York, PA
Posts: 2,753
Likes: 0
Received 0 Likes
on
0 Posts
2003 C230K Sport Coupe, 1986 190E 2.3
Well lets put it this way. The ECU is set to use a certain Octane Fuel. Diferent Octane Fuel's combust at diferent times, that is that a lower one will burn before a higher one. So you would actually have combustion occure before it was intended by using the lowe octane fuel. Therefore making combustion less efficient than it is supposed to be! Also you would cause excessive detonation, aka Ping, which can in the long run damage the engine. By damage I mean you may just put a hole in the top of a piston! In order for the ECU to back off timing to correct for pre-mature detonation it needs to first sense it. So assuming that the ECU will handle it is just plain wrong since it has to detect it to correct for it.
#218
Senior Member
Join Date: Feb 2002
Location: Dexter, Michigan, USA
Posts: 271
Likes: 0
Received 0 Likes
on
0 Posts
2002 C230k
Originally Posted by mctwin2kman
Diferent Octane Fuel's combust at diferent times, that is that a lower one will burn before a higher one. So you would actually have combustion occure before it was intended by using the lowe octane fuel.
#219
Super Member
Join Date: Nov 2003
Location: Montreal, Quebec
Posts: 570
Likes: 0
Received 0 Likes
on
0 Posts
2001 C240 Tectite
Your car will run fine at 87 and it should not damage the engine, the ECU will adapt and pre-ignite to prevent pinging, but you will lose a lot of power and greatly affect your mileage, so you'll end up paying more for the ammount of miles you'll drive once the tank is empty.
We have 87-89-91-94 here up north as well.
We have 87-89-91-94 here up north as well.
#220
MBWorld Fanatic!
Join Date: May 2002
Location: The blue white rock, third out.
Posts: 2,916
Likes: 0
Received 1 Like
on
1 Post
2002 C230 Coupe(M111)
Originally Posted by Narcissus
Your car will run fine at 87 and it should not damage the engine, the ECU will adapt and pre-ignite to prevent pinging, but you will lose a lot of power and greatly affect your mileage, so you'll end up paying more for the ammount of miles you'll drive once the tank is empty.
We have 87-89-91-94 here up north as well.
We have 87-89-91-94 here up north as well.
Never again...thing pinged like mad the last couple of days, especially in the heat.
#221
MBWorld Fanatic!
Join Date: Aug 2002
Location: York, PA
Posts: 2,753
Likes: 0
Received 0 Likes
on
0 Posts
2003 C230K Sport Coupe, 1986 190E 2.3
Originally Posted by Narcissus
Your car will run fine at 87 and it should not damage the engine, the ECU will adapt and pre-ignite to prevent pinging, but you will lose a lot of power and greatly affect your mileage, so you'll end up paying more for the ammount of miles you'll drive once the tank is empty.
We have 87-89-91-94 here up north as well.
We have 87-89-91-94 here up north as well.
#222
MBWorld Fanatic!
Join Date: Aug 2002
Location: York, PA
Posts: 2,753
Likes: 0
Received 0 Likes
on
0 Posts
2003 C230K Sport Coupe, 1986 190E 2.3
Originally Posted by Spyke
Nope. Under the same pressure/temp, a lower octane gasoline detonates before a higher octane gasoline. It has nothing to do with when combustion begins - the spark plug controls that. Or at least it should. If it doesn't, you have problems that higher octane gas won't fix.
#223
MBWorld Fanatic!
Originally Posted by mctwin2kman
Well lets put it this way. The ECU is set to use a certain Octane Fuel. Diferent Octane Fuel's combust at diferent times, that is that a lower one will burn before a higher one. So you would actually have combustion occure before it was intended by using the lowe octane fuel. Therefore making combustion less efficient than it is supposed to be! Also you would cause excessive detonation, aka Ping, which can in the long run damage the engine. By damage I mean you may just put a hole in the top of a piston! In order for the ECU to back off timing to correct for pre-mature detonation it needs to first sense it. So assuming that the ECU will handle it is just plain wrong since it has to detect it to correct for it.
The poor engine performance caused by the use of low octane fuel will not cause catalytic converter damage. The combustion process is still completed except that there is an uncontrolled secondary ignition source. It will, as you said, cause other major engine problems like burned pistons, broken rings, etc.
#224
MBWorld Fanatic!
Originally Posted by mctwin2kman
The ECU has to sense the Ping in order to retard the spark and timing. So no it is not OK to run lower Octane, especially in the C230K since it will cause detonation. I have no idea why no one understands that there has to be a Knock in order for the Knock Sensor to detect it. Thus if the ECU is reatarding then the damage is already being done. AAA actually did a story on this for our local news. Causes more damage to run lesser octane than required. Sorry to burst your bubble but it will hurt the engine in the long run.
#225
Senior Member
Join Date: Feb 2002
Location: Dexter, Michigan, USA
Posts: 271
Likes: 0
Received 0 Likes
on
0 Posts
2002 C230k
Originally Posted by mctwin2kman
If it does not Combust when it is supposed to then it is bad. The engine and ignition system is designed for certain octane. Therefore if you have Pre-Detonation due to Regular Gas igniting before it is supposed to then you have a problem!
One of the problems in these discussions is terminology. To me, if the mixture doesn't combust when it is supposed to you have a mis-fire. If it ignites before it is supposed to, you have pre-ignition. The octane rating of the gas isn't relevant to either. I have no idea what people mean by "pre-detonation"? There is pre-ignition, and there is detonation, but they are different events. "Pre-detonation" would seem to apply to the period before detonation occurs, which would in most cases mean normal combustion.
Anyway, pre-ignition is caused by a hot spot in the cylinder igniting the mixture before the plug fires. It is caused by a physical fault in the combustion chamber; a sharp edge, an exposed thread on the plug, a carbon deposit, whatever. You really need to address this fault to fix the problem, going to a higher octane gas isn't the correct answer here.
Detonation occurs when the unburned mixture in the cylinder auto-ignites/explodes/detonates as a result of the temp and pressure in the cylinder. There are numerous ways to fight this, one of them being using a gas that resists detonation longer, i.e. has a higher octane rating.
Pre-ignition may lead to detonation, but they are not the same thing. You can have one without the other.
EDIT: I re-read some of the replies here and I'm wondering if some people aren't envisioning a running engine as a series of explosions in the cylinders? That's not what's going on. In normal combustion, there is a flame front. The fuel actually does burn (rapidly) rather than explode. When the mixture detonates, the is no flame front, just BOOM. Many engine texts have pictures of normal combustion vs detonation - you can easily see the difference.
Regarding an earlier post - not only does light knock not harm an engine, it can actually increase power. I think VW published an SAE paper on this back in the late '70s, early '80s??? The problem is, who defines what "light" knock is, and how do you control it so it never becomes not-so-light knock?
Last edited by Spyke; 06-24-2005 at 02:27 PM.