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Does Everyone put 91+ octane in your E Class?

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Old May 12, 2021 | 11:14 PM
  #151  
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Originally Posted by Arrie
This is just funny but the 1958 2-stroke Evinrude might do just fine as the only part that could be eaten up by Ethanol would be the little rubber hose running from fuel tank to the carburetor.

But I get your point...
Well, old two strokes are particularly prone to dislike ethanol, the PH is low and the lubricity is low. they also miss lead, which was a lubricant of sorts.
gas tends to be in marine engines longer, just like small power equipment, ethanol blends do better if used relatively quickly.
being on or around the water and humidity will effect E85, to a lesser degree, E10.

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Old May 13, 2021 | 07:03 AM
  #152  
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Well, I’ve been a part of, and engaged in, many a debate over octane rating to use, best oil to buy, and best tires for many years across many different car brands I’ve owned. But I have to say, this one clearly takes the cake! I don’t think I’ve ever approached the whole dead bodies aspect before….. winner winner chicken dinner… best or nothing at all, and when it comes to the fuel debate - this one has been the best!

end of the day for me - I use premium because I just like the added power. If it costs me an extra $1,500 a year, well, so be it. Plus, I suspect it clubs more baby seals, and who doesn’t hate a baby seal? Ha!
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Old May 13, 2021 | 07:05 AM
  #153  
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Originally Posted by pierrejoliat
Well, old two strokes are particularly prone to dislike ethanol, the PH is low and the lubricity is low. they also miss lead, which was a lubricant of sorts.
gas tends to be in marine engines longer, just like small power equipment, ethanol blends do better if used relatively quickly.
being on or around the water and humidity will effect E85, to a lesser degree, E10.
Anyone who owns gas operated small power equipment, such as chain saws, blowers, trimmers, etc. knows (or should) to run the tank dry after use unless planning to use within next few weeks. I run mine dry unless I know I will be using it within a week or less.

I also never use gas with ethanol in it. I pay the extra to purchase ethanol free. Actually had to pay $85 to have the carburetor, etc. in a Stihl chain saw rebuilt because I had used gas with ethanol in it and left it in for a month. Even though I added Sta-Bilt.
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Old May 13, 2021 | 07:08 AM
  #154  
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Originally Posted by DFWdude
Since 2006, the IndyCar racing Series has used a variation of E85, which contains 85% ethanol and 15% high- octane racing fuel, which delivers an octane rating of 105. It seems to work fine for these high performance engines.

Keep in mind, petroleum stocks are also used to make most of the various plastics we consume. There will continue to be a need for this as oil stocks are depleted... Maybe sooner than anticipated.
Indy cars engines are nothing like what the ordinary car has other than being internal combustion and some common parts.
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Old May 13, 2021 | 07:12 AM
  #155  
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Originally Posted by pierrejoliat
Please re-read the first line in post 137, then go buy a Prius or a Tesla, save us all from the evil Iowa farmers. LOL.

And a quick FYI, Soylent green was made from plants, it was Soylent Orange that was made from people.
Soylent Green was made from people - at least in the movie.
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Old May 13, 2021 | 07:16 AM
  #156  
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Reminds me of a Buffet song I heard Sunday while drinking a Mojito.....

"Why dont we get drunk and Scr!@#@#!"

Talk about off topic....

91+ octane unless desperate
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Old May 13, 2021 | 07:39 AM
  #157  
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Originally Posted by El Cid
The only reason ethanol is used in fuel is because the corn producers and US government mandated it. It all began during a fuel "crisis" when the corn producers and their lobby convinced Congress that ethanol could be added to gasoline. The sole purpose was to reduce imports of gasoline, not to improve the gasoline in any way. It is not good for gasoline or gasoline powered equipment or vehicles.

It is required for political reasons and no other. That is why Iowa schedules its presidential caucus as first in the nation. Strictly so the Iowa corn producers can force candidates to continue to support ethanol.
The corn producers lobby is working hard to mandate 15% ethanol in gasoline (if not already done) and then they will work to mandate 20% and beyond.
It has become a growth industry for corn producers, refiners and transporters. So more lobbyists sending more money to Washington politicians.

Land that could be producing corn for animals or people has been diverted to corn for ethanol a it is more profitable for the corn producers.
Ethanol burns cleaner which IS good for the engine AND the environment
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Old May 13, 2021 | 08:11 AM
  #158  
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Originally Posted by rapidoxidation
I wonder how much land it will take to grow the fuel and where we'll be growing food.
Soylent green?
Internal combustion is on the way out, on that we might agree. Ethanol won't be the answer, PJ's objective opinion notwithstanding.
I think (hope) you meant to say PJ's subjective opinion. In other words, he is biased because he manufactures and sells ethanol.
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Old May 13, 2021 | 08:18 AM
  #159  
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Originally Posted by pierrejoliat
Please re-read the first line in post 137, then go buy a Prius or a Tesla, save us all from the evil Iowa farmers. LOL.

And a quick FYI, Soylent green was made from plants, it was Soylent Orange that was made from people.
I re-read first line in post 137 (below). What's your point? And as I noted elsewhere, as did others, Soylent Green was made from people, but the producers claimed it was made from plankton which actually no longer existed. Misinformation, misdirection and lies about a product.

"The quick answer is it's a wash, E-10 is great,E-85 not so much, the biggest difference is who gets the money big oil or big AG, with a small portion to farmers."
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Old May 13, 2021 | 09:10 AM
  #160  
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Originally Posted by El Cid
I think (hope) you meant to say PJ's subjective opinion. In other words, he is biased because he manufactures and sells ethanol.
I took it as sarcasm. I also don't leave gas in my Stihl chainsaws, or my Husqvarna backpack blower and line trimmer, especially over the winter, and I shake them and the two-cycle can before I start/fill them. the issue comes from cleaning out the gas residue. Leaving any fuel in small engines for extended time is not good.
E-10 cleans your fuel system, raises octane and helps farmers and the environment.

Last edited by pierrejoliat; May 13, 2021 at 09:19 AM.
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Old May 13, 2021 | 09:22 AM
  #161  
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Originally Posted by El Cid
Soylent Green was made from people - at least in the movie.
I remember the movie, but I read Greenburg's novel.
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Old May 13, 2021 | 09:33 AM
  #162  
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Clearly Greenburg mistitled his novel. Should've been Soylent Orange.

In using real gasoline, I've never - ever - had a fuel related problem in any of my far too many small engines that have old gas in them. Blower? Chain saws? Generator? Mower? No matter. Last season's fuel in them, fire 'em up.

I doubt I'd have the same results with ethanol laced fuel.
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Old May 13, 2021 | 09:34 AM
  #163  
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Originally Posted by E350_Sport
Ethanol burns cleaner which IS good for the engine AND the environment
In lab conditions, you may be correct.
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Old May 13, 2021 | 09:39 AM
  #164  
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if you use lower octane in these engines it does elevate exhaust gas temps so yes they can run the lower octane with the engineered anti knock systems but...You will increase exhaust temps that lower the life expectancy of emissions systems. Especially if you are stepping hard on the throttle. Now if you are driving it like any other commuter car and not dipping into the mid range power band you will be fine but then again why did you buy this car if you are not going to occasionally use the juice!
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Old May 13, 2021 | 11:08 AM
  #165  
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Curious what mileage folks are getting and what fuel they use to get it.
Ethanol free premium yields a consistent 29mpg at 6200' elevation and I'm not gentle with the pedal.
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Old May 13, 2021 | 01:03 PM
  #166  
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Originally Posted by pierrejoliat
I remember the movie, but I read Greenburg's novel.
Boy you guys are certainly living in an alternate reality. Harry Harrison wrote the novel, Greenburg did the script and it is Soylent Green, no idea where orange came from. But we're pretty far from the subject of this thread.

Next we'll start talking about the proper interpretation of quantum entanglement and how the Everett interpretation is correct and that's why you're from alternate realities.

https://en.wikipedia.org/wiki/Many-w...interpretation
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Old May 13, 2021 | 01:12 PM
  #167  
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Originally Posted by cetialpha5
Boy you guys are certainly living in an alternate reality. Harry Harrison wrote the novel, Greenburg did the script and it is Soylent Green, no idea where orange came from. But we're pretty far from the subject of this thread.

Next we'll start talking about the proper interpretation of quantum entanglement and how the Everett interpretation is correct and that's why you're from alternate realities.

https://en.wikipedia.org/wiki/Many-w...interpretation
If such things are of interest to you then may I suggest the miniseries Undone on Amazon Prime.
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Old May 13, 2021 | 01:21 PM
  #168  
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Originally Posted by rapidoxidation
If such things are of interest to you then may I suggest the miniseries Undone on Amazon Prime.
Thanks for the tip. I prefer harder SF like The Expanse which is also on Amazon Prime. At least the human side of the tech they have on the show is pretty solid.

(Cetialpha5 is a Star Trek Wrath of Khan reference)
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Old May 13, 2021 | 06:50 PM
  #169  
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Originally Posted by nc211
Well, I’ve been a part of, and engaged in, many a debate over octane rating to use, best oil to buy, and best tires for many years across many different car brands I’ve owned. But I have to say, this one clearly takes the cake! I don’t think I’ve ever approached the whole dead bodies aspect before….. winner winner chicken dinner… best or nothing at all, and when it comes to the fuel debate - this one has been the best!

end of the day for me - I use premium because I just like the added power. If it costs me an extra $1,500 a year, well, so be it. Plus, I suspect it clubs more baby seals, and who doesn’t hate a baby seal? Ha!
How does higher octane fuel provide more power? It is my understanding that octane is a measure of a fuel's resistance to auto-ignition - NOT a measure of energy content.
https://www.amsoil.com/newsstand/art...nock%20control.
https://www.eia.gov/energyexplained/...e-in-depth.php

I'm all for using high octane in engines where the manufacturer calls for it. Doing otherwise results in the ECU constantly adjusting timing due to input from the anti-knock sensors. To the unknowing driver, this unintentionally masks that the engine is not performing well on low octane fuel, But it not only reduces the efficiency of the engine, but also is hard on it. That is why in an engine like most Mercedes, using low octane fuel will feel like it has less energy.

However, to use high octane fuel in engines that don't require it does not yield more power. It does not burn cleaner. It does nothing.

Originally Posted by El Cid
Anyone who owns gas operated small power equipment, such as chain saws, blowers, trimmers, etc. knows (or should) to run the tank dry after use unless planning to use within next few weeks. I run mine dry unless I know I will be using it within a week or less.

I also never use gas with ethanol in it. I pay the extra to purchase ethanol free. Actually had to pay $85 to have the carburetor, etc. in a Stihl chain saw rebuilt because I had used gas with ethanol in it and left it in for a month. Even though I added Sta-Bilt.
Agreed. I also went through the very same experience, except it was my Sthil string trimmer that I had to have the carburetor replaced in. I always buy ethanol free fuel for all my small engine applications, 2 stroke and 4 stroke.
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Old May 13, 2021 | 06:55 PM
  #170  
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a higher octane fuel can be run at a higher compression ratio, and higher compression ratios give more power.
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Old May 13, 2021 | 07:21 PM
  #171  
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Originally Posted by cetialpha5
Boy you guys are certainly living in an alternate reality. Harry Harrison wrote the novel, Greenburg did the script and it is Soylent Green, no idea where orange came from. But we're pretty far from the subject of this thread.

Next we'll start talking about the proper interpretation of quantum entanglement and how the Everett interpretation is correct and that's why you're from alternate realities.

https://en.wikipedia.org/wiki/Many-w...interpretation
Maybe I'm wrong but I thought Harrison wrote Make Room Make Room and Greenburg wrote Soylent Green.

Last edited by pierrejoliat; May 13, 2021 at 07:33 PM.
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Old May 13, 2021 | 07:26 PM
  #172  
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Originally Posted by pierrejoliat
Maybe I have wrong but I thought Harrison wrote Make Room Make Room and Greenburg wrote Soylent Green.
Well there was mention of reading the novel. Harrison wrote the novel that the film was based on. Greenburg wrote the script. So if you say you read the novel, then Harrison wrote the novel. If you say you read the script, then Greenburg wrote the script.

https://en.wikipedia.org/wiki/Soylent_Green
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Old May 13, 2021 | 10:45 PM
  #173  
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Originally Posted by rapidoxidation
Curious what mileage folks are getting and what fuel they use to get it.
Ethanol free premium yields a consistent 29mpg at 6200' elevation and I'm not gentle with the pedal.
i think that equation is also influenced by the amount of air being mixed in as well. Example - I’ve had some work done on my car this year- new plugs, new fluids, etc. one thing I also did was clean the mass airflow sensor. Before the plugs and cleaning the MAF, on a highway cruise I’d get into the 30 mpg range at 70-80 mph with cruise control. But when then we plugs and clean MAF happened, that actually dropped a little into the high 20’s but the power of the car and the overall smoothness of the delivery of that power notably increased as well. Fuel is always the same for me - premium and 90% of the time it’s Costco. One would think the clean MAF and new plugs would require less fuel for maximum efficiency, but I think the dirty MAF meant more air and less fuel being delivered and therefore running a bit lean. Same thing happened to my neighbor when he recently had the MAF in his 02’ 911 cleaned. Power went up, ran much smoother, but mpg’s went down slightly.

I’m the DC area and lots of drives back to coastal NC or FL. I think I’m about 400 feet above sea level where I live.
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Old May 13, 2021 | 10:57 PM
  #174  
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Originally Posted by Left Coast Geek
a higher octane fuel can be run at a higher compression ratio, and higher compression ratios give more power.
Correct. But putting high octane fuel in a low compression engine does not produce any more power than low octane fuel in the same engine. By itself, high octane fuel has no more energy than a lower octane fuel.
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Old May 13, 2021 | 11:00 PM
  #175  
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Originally Posted by Left Coast Geek
a higher octane fuel can be run at a higher compression ratio, and higher compression ratios give more power.
An engine developing more power and the energy content of gasoline are two different things. The btu content of premium and regular are the same. So you don't get any more energy out of a gallon of premium than a gallon of regular. You can have an engine that can develop more power than others though.
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