Musikmann

Shalom Yoram,

Thank you very much - I am going to look for some here.

Regards,

Musikmann

E320Star

True with the 98 octane overseas. Most of Europe they get their oil from the middle east and the higest octane is 98. I guess most of europe are considered smaller countries with a lot less demand for oil. Not like us us American's with our redneck pickup trucks and SUV drivers gas guzzing machines !

Musikmann

I'd like to see how well (or poorly) my beast would run on that stuff!

uberwgn

Their measurement standard is not the same as used in the USA.

uberwgn

A-men!


It's interesting that nobody has touched upon the real reason for the mfr. spec-ing a minimum fuel quality. It has more to do with protecting the engine over the long haul so it doesn't damage itself. The combustion chamber design and piston design, coupled with a high C/R, mandate a minimum fuel quality so long-term damage does not result.


More reasons to use the fuel specified by the engine mfr: http://www.caranddriver.com/article....&page_number=1 AND http://www.caranddriver.com/features...r-premium.html

no_clue

The most common type of octane rating worldwide is the Research Octane Number (RON). RON is determined by running the fuel through a specific test engine with a variable compression ratio under controlled conditions, and comparing these results with those for mixtures of isooctane and n-heptane.

There is another type of octane rating, called Motor Octane Number (MON), which is a better measure of how the fuel behaves when under load. MON testing uses a similar test engine to that used in RON testing, but with a preheated fuel mixture, a higher engine speed, and variable ignition timing to further stress the fuel's knock resistance. Depending on the composition of the fuel, the MON of a modern gasoline will be about 8 to 10 points lower than the RON. Normally fuel specifications require both a minimum RON and a minimum MON.

In most countries (including all of Europe and Australia) the "headline" octane that would be shown on the pump is the RON, but in the United States and some other countries the headline number is the average of the RON and the MON, sometimes called the Anti-Knock Index (AKI), Road Octane Number (RdON), Pump Octane Number (PON), or (R+M)/2. Because of the 10 point difference noted above, this means that the octane in the United States will be about 4 to 5 points lower than the same fuel elsewhere: 87 octane fuel, the "normal" gasoline in the US and Canada, would be 91 in Europe.
The octane rating may also be a "trade name", with the actual figure being higher than the nominal rating.

It is possible for a fuel to have a RON greater than 100, because isooctane is not the most knock-resistant substance available. Racing fuels, straight ethanol, Avgas and liquified petroleum gas (LPG) typically have octane ratings of 110 or significantly higher. Typical "octane booster" additives include tetra-ethyl lead and toluene. Tetra-ethyl lead is easily decomposed to its component radicals, which react with the radicals from the fuel and oxygen that would start the combustion, thereby delaying ignition.

Air Marshall Eldritch

This is the only dealer in the US I could find for Liqui Moly products:

http://www.interautopartssd.com/liquimoly.php

The part numbers seem to be different.

Yoram, can you look the pictures and tell what matches your bottle?

Musikmann

VERY informative!

Thanks to you no_clue

Musikmann

Thanks too RBenton88!

Since I seem to have seen this before Yoram did, I'm betting that we are talking about #2030 - Fuel System Cleaner for $9.99 per can.

If I can figure out how often Daimler recommends we use this, I'd buy a case. That distributor might tell us what's on the can, but I think I'd rather take the advice of a certified MB tech. I'll post something about it on that other forum.

M

mysticblu999

im thinking of trying 114 in my E55 when i get it back? how will that work??

yoram611

hi RBrenton88,

I found out the web site of LIQUI MOLY :www.liqui-moly.de

I have not found the exact same item with the same name ,but from reading their description it seems to me that the similar item is called JECTRON ( it also has the same drawing on it) , or it could be :FUEL SYSTEM CLEANER ,
I dont know the difference between them.


enclosed is a picture of the can they sell in Israel.

uberwgn

patrick_y

Go with the premium gas. It's worth it for the performance alone.

Like cigarettes, the expensive stuff is coming closer to the cheap stuff percentage wise. Premium gas is usually about $0.20 more than the Regular gas. In the past, when gas prices were lower, it was also about $0.20 cents. So thus, the percentage cost factor for premium compared to regular gas has actually decreased.

I hope that you understand where I'm coming from. Gas in all is still going up, but I'm saying the gap between premium and regular has gone down percentage wise than the past.

MichaelWebb

I just bought a c230 a few weeks ago and my salesman said that it would run fine on mid-grade (89). I am glad that I read these posts. Now I realize that it is only a few bucks more for better performance and could potentially save headaches in the future. And by the way here in Florida it is regular (87) mid (89) premium (93).

Musikmann

Some G** d*** salesmen just want to sell you a car If the manufacturer recommends anything, I'd say take their advice. One possible exception is this: they said on my 2 MBs to use tire pressure of 27psi, I'm not sure that is the best, and I've seen several posts from people who raise that a few pounds. It's probably best to start there, and raise it according to how you want your C230 to handle.

Good luck and welcome to mbworld.org
M

Penn

In Australia E10 (10% Ethanol Blend) 95 Octane is less expensive than normal unleaded. Mercedes Benz allow E10 as an acceptable fuel.

mguerrero

well some how yesterday i was not paying attention and filled my tank with 87 octane gas, i haven't noticed to much of a difference, but is there anything i should do until i fill up again?

Musikmann

DO NOT rev your car too high! Just drive it "putt-putt" mode until you have the tank of 87 as low as you are comfortable with. Then fill it up with 91 (or 93 preferably if you can find it where you are).

Good luck,
Musikmann

E420SportGT

funny how my Benz gets 91 and my mustang gets 93 or 100 octane..yes..here in Cali. There is a VP Racing gas station in San Leandro..and has 87,93,100..dedicated to high performance cars that are blown. Since the stang is supercharged, it's loving the 100octane alot There's also a 76 down in Woodside (near Mountain View) that sells 100 or more..and another one in San Jose...

Musikmann

I forgot that I have seen a product for sale in various places called "Octane Boost" or something similar.

I have no idea what is in it, but it were me, I'd follow my 1st suggestion. The booster might be harmless OR harmful, but why take the chance? Plus, I think my "idea" came from an owner's manual regarding "If you cannot find premium fuel, do this."

Musikmann

If you ever put the 100 octane in your Benz, please let us know what you think of it. What does NASCAR use, anyone know?

ndabunka

http://www.caranddriver.com/columns/...ter-page2.html
http://www.vpracingfuels.com/index2.html

sts15

The price of gas is dropping like a rock. Back when premium was in the 3.80 range, I was filling up when the tank was half empty purely for psychology reasons.... I was alternating between 93 and 89 octang assuming it would even out to 91.

Does anyone know if that is true?

E43

In theory, yes. Gas stations have underground tanks that hold regular, premium, and diesel. When you specify midgrade, the pump automatically mixes regular and premium in the correct proportions to give you midgrade. It is impossible to determine if your manual mixture of the two evened out to 91, but I am sure it was close enough not to do any damage to the car.