View Poll Results: Since gas is going up again.....what grade gas do you put in your C?
Always use regular unleaded
2
2.60%
Always use PLUS unleaded
1
1.30%
Always use PREMIUM unleaded
73
94.81%
Random...different grades at different times
1
1.30%
Voters: 77. You may not vote on this poll
what kinda gas do you put in your C?
12-03-2005, 03:03 AM
#251
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C 230K Coupé
new thread new idea!! i think it help some ppls too and save their baby life....
12-03-2005, 03:34 AM
#252
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Originally Posted by r3v1ls
Nothing mentioned in this thread is different from the other 5 that exist... learn to search...
1. Running a fuel with an octane rating lower than optimum/recommended WILL lower your MPG no matter what your driving style. An engine will ping MORE under part throttle load where mixtures are at their leanest. This retards the timing and lowers engine output which means you need more fuel to reach the same HP.
2.. ALL fuel comes from the same pipe but the fuel is NOT the same. Refineries send all types of gasoline, diesel, heating oil, etc. to the local racks in batches in the SAME pipe. They "try" to run similar fuels next to each other but some diesel will inevitably get mixed into the gasoline that is pumped next. Do you know where that gas goes? Arco, Rotten Robbie, 7-11 and other discounters. The pay less for it and pass the savings and the crappy fuel on to the consumer.
3. Why do I bother with the newbs?
12-03-2005, 07:23 AM
#254
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Originally Posted by E55AMG99
No kidding! This thread is full of so much mis information it's pitiful.
3. Why do I bother with the newbs?
3. Why do I bother with the newbs?
All that pinging and detonation will catch up with them sooner or later. AND over what? $0.20/gallon? 
LOL no thanks. If that's what I pay for peace of mind then I will keep paying it. 
Last edited by sdsilverm3; 12-03-2005 at 07:40 AM.
12-03-2005, 12:28 PM
#255
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'05 E320 CDI, '08 BMW X5 4.8i, '11 Duramax 2500HD
Originally Posted by E55AMG99
No kidding! This thread is full of so much mis information it's pitiful.
1. Running a fuel with an octane rating lower than optimum/recommended WILL lower your MPG no matter what your driving style. An engine will ping MORE under part throttle load where mixtures are at their leanest. This retards the timing and lowers engine output which means you need more fuel to reach the same HP.
1. Running a fuel with an octane rating lower than optimum/recommended WILL lower your MPG no matter what your driving style. An engine will ping MORE under part throttle load where mixtures are at their leanest. This retards the timing and lowers engine output which means you need more fuel to reach the same HP.
She said "it runs fine" and the dealer told her she didn't need to use the 91!
I said, sure it runs.. but the ECU will retard the engine for the crappy gas! therefore it's not as efficient as it should be and therefore more gas consumed!
Man, some people are dumb! Thank God my mom listens to her son.. she goes as far as tries to find a Chevron for the Techron additive.
btw.. how am I going to recognize you at the restaurant today? Surely you're not hot as the Avitar?
Do you have a table under your name?
12-03-2005, 01:35 PM
#256
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2007 ML500
Originally Posted by revstriker
All cars that use a Catalytic Converter need unleaded gas. In the US, cars have been required to have this since the mid 80s. I don't even think you can buy leaded gas at a regular gas station anymore.
Of course, this has nothing to do with Octane.
Of course, this has nothing to do with Octane.
12-03-2005, 03:04 PM
#258
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Midnight Blue 2004.5 C230 Kompressor Sport Sedan. 2002 w210 E320, 2009 w211 E350 Sport
Originally Posted by r3v1ls
Nothing mentioned in this thread is different from the other 5 that exist... learn to search...
12-04-2005, 04:54 AM
#259
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a quarter mile at a time
this is the only half credible article I've been able to find about the topic
http://www.lubedev.com/articles/octane.htm
BTW - you could probably save much more gas (and money) by driving slower, taking those golf clubs out of your trunk, and making sure your tires have enough pressure.
http://www.lubedev.com/articles/octane.htm
BTW - you could probably save much more gas (and money) by driving slower, taking those golf clubs out of your trunk, and making sure your tires have enough pressure.
12-04-2005, 10:45 AM
#260
Senior Member
I use 91 from Citgo or Mobil. Only places around here that have it. Most place just have 87, 89, and 93. I used 93 a few times when I'm near empty and can't find 91. I usually just put $5-10 in just to get me to where I need to go, then I fill up with 91. I seem to get better gas mileage with the 91, and the car runs a lot better. Never tried 87 or 89.
12-04-2005, 11:49 AM
#261
MBWorld Fanatic!
Originally Posted by e1000
this is the only half credible article I've been able to find about the topic
http://www.lubedev.com/articles/octane.htm
BTW - you could probably save much more gas (and money) by driving slower, taking those golf clubs out of your trunk, and making sure your tires have enough pressure.
http://www.lubedev.com/articles/octane.htm
BTW - you could probably save much more gas (and money) by driving slower, taking those golf clubs out of your trunk, and making sure your tires have enough pressure.
That has to be the most misleading piece that I have ever read. Their whole site is full of mileading information. The article was written before OBDII and does not take into account the ability of the ECU to adjust power output for different octane ratings. Try it for youself and see.
However, you are correct. Lighten the load, slow down and properly inflate you tires for best mileage.
12-04-2005, 02:29 PM
#263
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2005 C230K Sport Sedan, 6 speed manual
While it is true most gasoline flows through the same pipeline, this does not imply all gasoline is the same. Additives, processing, and handling may vary.
In terms of octane level, I would go with what the team of highly-paid engineers at MB recommends. I am unwilling to risk an engine to save a few pennies on fuel. Also, as fuel prices increase, the percentage for higher grade fuel decreases.
Again, I would strongly recommend staying with one of the brands that meet the Top Tier standard. According to the website www.toptiergas.com these brands are:
QuikTrip
Chevron
Conoco
Phillips
76
Shell
Entec Stations
MFA Oil Company
Kwik Trip/Kwik Star
The Somerset Refinery, Inc.
Chevron-Canada
In terms of octane level, I would go with what the team of highly-paid engineers at MB recommends. I am unwilling to risk an engine to save a few pennies on fuel. Also, as fuel prices increase, the percentage for higher grade fuel decreases.
Again, I would strongly recommend staying with one of the brands that meet the Top Tier standard. According to the website www.toptiergas.com these brands are:
QuikTrip
Chevron
Conoco
Phillips
76
Shell
Entec Stations
MFA Oil Company
Kwik Trip/Kwik Star
The Somerset Refinery, Inc.
Chevron-Canada
12-04-2005, 04:45 PM
#264
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2013 c300 4matic, 2002 c240
same here. it is the same price as 92 at speedway and 93 at BP. so might as well just fill up with the 94.
Originally Posted by Bing
i go to:
and pump in:
and pump in:
12-04-2005, 04:54 PM
#265
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2013 c300 4matic, 2002 c240
Originally Posted by alpinweiss
While it is true most gasoline flows through the same pipeline, this does not imply all gasoline is the same. Additives, processing, and handling may vary.
In terms of octane level, I would go with what the team of highly-paid engineers at MB recommends. I am unwilling to risk an engine to save a few pennies on fuel. Also, as fuel prices increase, the percentage for higher grade fuel decreases.
Again, I would strongly recommend staying with one of the brands that meet the Top Tier standard. According to the website www.toptiergas.com these brands are:
QuikTrip
Chevron
Conoco
Phillips
76
Shell
Entec Stations
MFA Oil Company
Kwik Trip/Kwik Star
The Somerset Refinery, Inc.
Chevron-Canada
In terms of octane level, I would go with what the team of highly-paid engineers at MB recommends. I am unwilling to risk an engine to save a few pennies on fuel. Also, as fuel prices increase, the percentage for higher grade fuel decreases.
Again, I would strongly recommend staying with one of the brands that meet the Top Tier standard. According to the website www.toptiergas.com these brands are:
QuikTrip
Chevron
Conoco
Phillips
76
Shell
Entec Stations
MFA Oil Company
Kwik Trip/Kwik Star
The Somerset Refinery, Inc.
Chevron-Canada
12-04-2005, 06:16 PM
#266
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Waiting for W204 Facelift
first 98 octane ..... but nonknown firm ....and problem occured..
after choose Shell 98 or new 100 or BP Ultimate 98
tried Shell V-super 100 octane ? performance change ?
after choose Shell 98 or new 100 or BP Ultimate 98
tried Shell V-super 100 octane ? performance change ?
08-23-2006, 12:41 AM
#268
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91 Chevron with Techron...I actually personally like 76 when I had a Acura and was putting in 87 since it was cheaper but down the block the Chevron's 87 is 2 cent more expensive but the 91 is about 9 cent cheaper....weird
08-23-2006, 02:32 AM
#272
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hey!
Originally Posted by chkdg8
I once saw this short documentary on how the gas industry is manipulated by advertising hype between all major carriers. For example how chevron uses techron and others use different chemicals to improve their blend and thus make theirs the best fuel for your consumption. It also went on to talk about the different grades as well and they came out with the conclusion that it's all a selling tactic to be used on the consumer. They did specify however, that you should use 91 grade and higher for high output engines found in a ferrari, porsche, lamborghini and of course turbo or super charged vehicles.
This story was pretty interesting because it interviewed former representatives from "big oil", advertising agents and some un-named nascar drivers. They explained how it is impossible for a certain company like chevron, to say their product is better or more efficient by adding techron to their solution because all companies get their fuel from the same source. Once the oil is refined and the petroleum is processed to met goverment regulations to each global region, it is sold as is to the major companies. Those companies then ship to their refineries and then fill up their trucks. That's it. The only difference between the companies are how they compete for you dollar.
For those of us who do own a supercharged engine, I'm assuming we should use 91+ grade. Below, I've added a snap shot off of Digi-Tec's website on how they refer to fuel.
http://www.digi-tec.us/home.html
:v
This story was pretty interesting because it interviewed former representatives from "big oil", advertising agents and some un-named nascar drivers. They explained how it is impossible for a certain company like chevron, to say their product is better or more efficient by adding techron to their solution because all companies get their fuel from the same source. Once the oil is refined and the petroleum is processed to met goverment regulations to each global region, it is sold as is to the major companies. Those companies then ship to their refineries and then fill up their trucks. That's it. The only difference between the companies are how they compete for you dollar.
For those of us who do own a supercharged engine, I'm assuming we should use 91+ grade. Below, I've added a snap shot off of Digi-Tec's website on how they refer to fuel.
http://www.digi-tec.us/home.html
:v
do you remember which documentary? i wanted to check it out. i had an arguement w/ my brother in law about the difference between arco oil and a top tier gas company. he told me to go watch it but couldn't remember what the title was.
08-23-2006, 06:58 AM
#274
MBWorld Fanatic!
In California, I believe the highest octane rating is 91. You can special order the 100 octane unleaded from 76 but at great cost.
I prefer Shell and Chevron, I only use premium because of the performance factor. The owners manual also states that if less than premium fuel must be used, only fill the tank half way and add premium as soon as possible.
Shell, Chevron, and sometimes 76 when I have no choice. In my town, there's a 76 and a Shell right next to each other, even though the Shell is usually noticeably more expensive and the station is not as well lit as the 76, I still usually go to the Shell station. I will only use Top Tier gasoline in my car from these three companies. If I were on a long road trip in unfamiliar territory, I would even plan my fill-up stops by researching the various Shell and Chevron gas stations on my route.
I prefer Shell and Chevron, I only use premium because of the performance factor. The owners manual also states that if less than premium fuel must be used, only fill the tank half way and add premium as soon as possible.
Shell, Chevron, and sometimes 76 when I have no choice. In my town, there's a 76 and a Shell right next to each other, even though the Shell is usually noticeably more expensive and the station is not as well lit as the 76, I still usually go to the Shell station. I will only use Top Tier gasoline in my car from these three companies. If I were on a long road trip in unfamiliar territory, I would even plan my fill-up stops by researching the various Shell and Chevron gas stations on my route.
