Premium or Regular Unleaded?
Newbie
Joined: Mar 2007
Posts: 14
Likes: 0
From: NY
2014 E350
These cars are sold across the globe and exposed to different enviromental conditions. As a result Mercedes takes a conservative approach and recommends the best possible gas and for that matter oil. If you live high up in the mountains when yes, perhaps you should be using a higher level octaine but if you are at a dead sea level when you are just wasting money.
Mercedes takes the same approach with motor oil when they recommend 0W-40 for most of its cars. Whats the point of putting 0W-40 motor oil in your Mercedes if you live in Saudi Arabia, do you really expect winters to hit -45?
Mercedes takes the same approach with motor oil when they recommend 0W-40 for most of its cars. Whats the point of putting 0W-40 motor oil in your Mercedes if you live in Saudi Arabia, do you really expect winters to hit -45?
Last edited by vedro; Jan 6, 2014 at 01:45 PM.
MBWorld Fanatic!
Joined: Oct 2010
Posts: 5,142
Likes: 1,295
From: Southern US
2010 E550, 273 Engine: 2012 S550, 278 Engine
1. All gasoline sold in U.S. has ethanol, even premium except those specifically sold as not having ethanol. Non-ethanol premium is going to cost considerably more than premium and most "branded" stations will not sell non-ethanol fuels.
2. Ethanol does not raise the octane. The sole purpose of ethanol was to add something to fuel to lower imports of petroleum. Sort of like watering down beer or liquor.
Now its purpose is to provide income for corn agribusiness, refineries, distributors, transporters, and politicians they support.
If ethanol was so good, the US would cancel the embargo on Cuba and import sugar to make higher grade ethanol.
2. Ethanol does not raise the octane. The sole purpose of ethanol was to add something to fuel to lower imports of petroleum. Sort of like watering down beer or liquor.
Now its purpose is to provide income for corn agribusiness, refineries, distributors, transporters, and politicians they support.
If ethanol was so good, the US would cancel the embargo on Cuba and import sugar to make higher grade ethanol.
MBWorld Fanatic!
Joined: Nov 2009
Posts: 2,616
Likes: 160
From: Southeastern USA
2010 E350 Luxury Sedan, Engine 272 (V6)
Supply and Demand
Ethanol does NOT raise the octane level of fuels.
MBWorld Fanatic!
Joined: Oct 2010
Posts: 5,142
Likes: 1,295
From: Southern US
2010 E550, 273 Engine: 2012 S550, 278 Engine
Since almost all stations are required to sell all types of gas with ethanol, most do not want an extra set of tanks and maybe pumps for non-ethanol fuels. So they don't purchase it. This creates a very low demand for the distributors who must transport the gas from tank farms to local stations. Therefore they have to charge extra for it. Also, because of the higher cost, the stations selling non-ethanol must charge more since they can't make it up on volume sales. Not to mention, people will pay more for non-ethanol. I use non-ethanol 93 octane in all my outdoor equipment even though only requires 87 octane. This is due to the harmful effects of ethanol on small engines.
Ethanol does NOT raise the octane level of fuels.
Ethanol does NOT raise the octane level of fuels.
http://www.racq.com.au/motoring/cars..._octane_number
http://answers.yahoo.com/question/in...4150245AAnfbUg
MBWorld Fanatic!
Joined: Nov 2009
Posts: 2,616
Likes: 160
From: Southeastern USA
2010 E350 Luxury Sedan, Engine 272 (V6)
This one says E10 does not raise octane levels. Even worse though is the loss of fuel efficiency (MPG) and performance with any level of ethanol.
http://www.fuel-testers.com/gasoline...hanol_E10.html
Regardelss, thread is whether to use 87 or 91 octane and answer is always use 91.
You believe what you want and I'll know what I know.
http://www.fuel-testers.com/gasoline...hanol_E10.html
Regardelss, thread is whether to use 87 or 91 octane and answer is always use 91.
You believe what you want and I'll know what I know.
MBWorld Fanatic!
Joined: Oct 2010
Posts: 5,142
Likes: 1,295
From: Southern US
2010 E550, 273 Engine: 2012 S550, 278 Engine
This one says E10 does not raise octane levels. Even worse though is the loss of fuel efficiency (MPG) and performance with any level of ethanol.
http://www.fuel-testers.com/gasoline...hanol_E10.html
Regardelss, thread is whether to use 87 or 91 octane and answer is always use 91.
You believe what you want and I'll know what I know.
http://www.fuel-testers.com/gasoline...hanol_E10.html
Regardelss, thread is whether to use 87 or 91 octane and answer is always use 91.
You believe what you want and I'll know what I know.
I have always said that it does not make any sense to run with lower octane gas as your savings at the pump are lost on the road. I always go with 93 octane if it is available.
Super Member
Joined: Nov 2013
Posts: 746
Likes: 178
From: NorCal
2015 ML350+2025 E350
1. All gasoline sold in U.S. has ethanol, even premium except those specifically sold as not having ethanol. Non-ethanol premium is going to cost considerably more than premium and most "branded" stations will not sell non-ethanol fuels.
2. Ethanol does not raise the octane. The sole purpose of ethanol was to add something to fuel to lower imports of petroleum. Sort of like watering down beer or liquor.
Now its purpose is to provide income for corn agribusiness, refineries, distributors, transporters, and politicians they support.
If ethanol was so good, the US would cancel the embargo on Cuba and import sugar to make higher grade ethanol.
2. Ethanol does not raise the octane. The sole purpose of ethanol was to add something to fuel to lower imports of petroleum. Sort of like watering down beer or liquor.
Now its purpose is to provide income for corn agribusiness, refineries, distributors, transporters, and politicians they support.
If ethanol was so good, the US would cancel the embargo on Cuba and import sugar to make higher grade ethanol.
The MB engine has been designed to run on Premium for all of the reasons discussed...such as ethanol fuels which because of economics and politics are not going away anytime soon; increased compression and advanced timing to overcome the power lost due to ethanol fuels; providing reasonable fuel economy and performance, etc. You can run your car on Regular grade but unless you drive like "the little old lady" I really don't think it is recommended.
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