also like to use a little bacon grease........it doesn't mix with the gas, and also produces a really pleasent bacony smell
What fuel do you use??
MBWorld Fanatic!
Joined: Jun 2009
Posts: 1,800
Likes: 14
1953 300 Adenauer, 1971 300 SEL 6.3, 1975 600, 1978 450 6.9
Octane rating affects the car by what the engine is made to run with. If it is a high compression engine, like the most car engines in the world now are (Europe, Far East) it can make a big difference with the octane. If the engine is made to use high octane you will see a drop in fuel mileage if you run low octane gas. You will also feel lack of power.
If the engine is designed to run 87 like most U.S. cars at least used to be you will not see gas mileage improvement if you run high octane gas. This is simply because the engine was not designed for it. It is waste of money to use high octane fuel on a car that was designed to run with low octane.
And another fact is that all gas regardless of octane rating has the same amount of energy in it. Hig octane does not have more energy than low octane. It is all about how the engine behaves with it.
Most or perhaps all Japanese (or Far East) cars advertice that they run 87 octane fuel. This is because they can use it and they understand that people around will pick the car that can be run with it. If they would fill up with the premium fuel they would feel power increase and without themselves knowing would also get better fuel mileage, which would offset the higher price at the pump.
The engine does not know where it is, i.e. if it in the mountains or not. The sensors measure and adjust things like fuel injection accordingly. With low octane fuel high compression engine cannot take as much fuel in as it would pre-detonate. This means that a cylinder cannot produce the same "kick" as with the high octane fuel. This also means the efficiency from the cylinder goes down, i.e. you miss some forward movement from the fuel you burn. With high octane fuel the cylinder can take the maximum amount of air and fuel for maximum compression for the maximum "kick" for the maximum power and gas mileage.
If the engine is designed to run 87 like most U.S. cars at least used to be you will not see gas mileage improvement if you run high octane gas. This is simply because the engine was not designed for it. It is waste of money to use high octane fuel on a car that was designed to run with low octane.
And another fact is that all gas regardless of octane rating has the same amount of energy in it. Hig octane does not have more energy than low octane. It is all about how the engine behaves with it.
Most or perhaps all Japanese (or Far East) cars advertice that they run 87 octane fuel. This is because they can use it and they understand that people around will pick the car that can be run with it. If they would fill up with the premium fuel they would feel power increase and without themselves knowing would also get better fuel mileage, which would offset the higher price at the pump.
The engine does not know where it is, i.e. if it in the mountains or not. The sensors measure and adjust things like fuel injection accordingly. With low octane fuel high compression engine cannot take as much fuel in as it would pre-detonate. This means that a cylinder cannot produce the same "kick" as with the high octane fuel. This also means the efficiency from the cylinder goes down, i.e. you miss some forward movement from the fuel you burn. With high octane fuel the cylinder can take the maximum amount of air and fuel for maximum compression for the maximum "kick" for the maximum power and gas mileage.
MBWorld Fanatic!
Joined: Jun 2009
Posts: 1,800
Likes: 14
1953 300 Adenauer, 1971 300 SEL 6.3, 1975 600, 1978 450 6.9
Senior Member
Joined: May 2007
Posts: 457
Likes: 61
asdas
Not quite. I was referring to last sentence of your prior thread. Clearly an expression of your opinion.
Based on the title of the OP, "What fuel do you use?", it would suggest anecdotal information, opinions and facts are all welcome. If he had asked ,"What fuel should I use", your rant would be appropriate. So lighten up.
Based on the title of the OP, "What fuel do you use?", it would suggest anecdotal information, opinions and facts are all welcome. If he had asked ,"What fuel should I use", your rant would be appropriate. So lighten up.
Super Member
Joined: Oct 2010
Posts: 764
Likes: 10
From: North Carolina
2010 E350, 2015 S550
Clearly your opinion, again!! See, it's all part of the fun. Now all you have to do is contribute something interesting without a snide comment.
Out Of Control!!
Joined: Jun 2008
Posts: 10,557
Likes: 24
From: Earth
Porsche Macan S SportDesign / Ex M-B's: 11 & 10 & 06 E350's, 02 S500
Indeed. Though, for the record I might be confusing him with someone else, pretty sure I've got the right screen name though. 
MB World Stories
The Best of Mercedes & AMG
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun
Verdad Gallardo
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Verdad Gallardo
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine
Verdad Gallardo
Flawlessly Restored Mercedes 190E Evo II Heads to Auction
Verdad Gallardo
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know
Verdad Gallardo
Mercedes EQS Gets A Major Update: Everything You Need to Know
Verdad Gallardo
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve
Verdad Gallardo
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping
Verdad Gallardo
