03-16-2020, 06:06 PM | #23 | |
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You specifically said that lower octane will destroy the engine. There's zero evidence of that. You are clearly not an engineer or scientist. There isn't some engineering team that magically designs a car that specifically runs on 93 octane gas. That's simply not how engineering and science works. Octane is referring to combustibility. This is fairly basic HS chemistry. Higher combustibility will yield greater power and slightly greater miles per gallon. This is what I use in my Exotics. For my daily drivers, it's not needed as I rarely utilize even 50% of the power. This is why the vast majority of people fill with 87 octane and no engines are destroyed! No more free education for you. Your behavior is unappealing to me. |
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03-16-2020, 07:50 PM | #24 | ||
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And in regards to what you're saying, if octane didn't matter, manufacturers wouldn't say the recommended octane for the vehicle on the gas cap, owners manual and other literature for the car. Nowhere in any of my responses did I say it would destroy the engine, actually said it WONT. Furthermore, if you look at what I said in my original post, my whole point was why buy a high horsepower car when you don't "use it". Maybe YOU don't use it, but there are plenty who do. Posting that running 87 is perfectly fine is not providing good, quality information. It's a false narrative you provide because it's how YOU justify being cheap on saving pennies on gas. I promise you people will read what you say, go fill with 87 and complain about subpar performance. And yes, the computer will save any major damage to the engine but I'd be willing to bet running lower octane for extended periods of time while pushing it hard, may cause misfires, plug issues etc. You assumed I don't know the difference between octane levels, because I don't agree with running lower octane. You got triggered by my opinion on the matter and put words in my mouth. If I offended you or anyone, that was not my intention. Providing the correct information on a forum of which lots of people rely on, including myself, is what's important. So, I apologize for throwing insults. One shouldn't make assumptions on another knowledge either. It's a good way to cause these types of posts. While I don't have engineering background, I've helped several on this very forum, fix and maintain their vehicles.
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03-16-2020, 10:33 PM | #25 | |
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Manufacturers recommend higher octane so they can achieve the higher performance #'s, simple as that. Interestingly, many of the lower HP, smaller engines actually have an even higher compression ratio than the S63. So you'd think the cheapo cars would have issues when people use 87 octane. The reality is, they do just the same from a longevity standpoint (totally agree that power and mpg are lower). My main point is simple, octane does not equal quality. Nothing wrong with 87 or 89 or 91 or 93 octane when it comes to engine longevity (I've been filling 87 for years in over 50 cars...no issues). The only reason I use 93 in my exotics is because I want full power all the time when I drive them! What is important is the quality of the gas station and their gas. Give me a 87 octane from Top Tier Gas all day over 93 octane from some random gas station. |
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03-17-2020, 04:40 PM | #26 |
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So was the marriage ok
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03-17-2020, 04:47 PM | #27 |
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03-17-2020, 04:49 PM | #28 | ||
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03-19-2020, 01:40 AM | #29 |
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You could add 2 gallons or so of e85. That will boost your octane. Here is a link to help you calculate:
https://www.brewcity**********/about...ol-calculator/ Most stock tunes will allow for 87 as the lowest. This is incase it is accidentally added to the car. Adding e85 (just a couple gallons) will significantly boost octane (e85=100 to 105 octane). Just remember it has a lower ignition temp (good for the motor), but it will burn about 30% faster. For this reason, dont add too much, unless you tune for it. Im in a super charged e92 m3 and mix every now and then. Generally its advised not to mix more than e20. The f12 m6 has a better fuel system, so you may able to do more. Running the 87aki will slow down timing quite a bit. But the stock config will allow it, its just not good. All bmws love octane Good luck! Also I should be getting an f12 m6 and building it in the near future. Hopefully will keep the m3 for the track and m6 for daily. |
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03-19-2020, 01:41 AM | #30 | |||
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03-19-2020, 08:16 AM | #31 | |
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03-19-2020, 09:49 AM | #32 | |
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On a separate note, E85 is a completely different Beast. Engines are not designed to run on E85 unless they're flex-fuel certified. So in my opinion, if you put too much E85 in the tank, it will do more damage long term than filling regular old gasoline at 87 octane, which will not do damage to the engine if you drive it normally. |
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03-19-2020, 02:11 PM | #33 |
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E85????
Anyone using E85 fuel may want to read the info below about BMW's stance on fuel blends containing a high percentage of alcohol (over 10%). I do understand that owners can use what they decide is right for themselves...but just in case others may not have a lot of knowledge about fuels with high percentages of alcohol...read the info below to be "in the know" as to where BMW stands on the issue in regards to your car's performance, drive-ability, fuel consumption, and warranty. In countries were alcohol based fuels are prevalent...BMW has an option for those situations where an ethanol sensor is used: The ethanol sensor is used in conjunction with the Flexible Fuel option, SA1AE.
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Become a BMW CCA member! Click HERE to join and feel free to use my BMW CCA member #191509 as a referral. Last edited by Qsilver7; 03-19-2020 at 02:25 PM.. |
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03-19-2020, 02:15 PM | #34 |
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Correct QSilver. I don't know where this myth that octane equals quality came from and I definitely didn't realize that people on this forum are actually putting high doses of E85 in their engines! I thought enthusiasts knew better.
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03-19-2020, 03:09 PM | #36 | ||
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E85 blend has been known to be perfectly fine for our cars. You just can't have to high of E85 content. Max 4 gallons. It's well documented. A manufacturer like BMW won't say it's safe to run since you really can't run a full tank of it. They SHOULD say you can't run it. Cause there will be some dumbass that will run full E85 and wonder why they have issues. Regardless, the E85 at 4 gallons is a temporary fix for MY issues. I have a VP Racing less than a mile away and will run an MS109 mix with 93 to help. My issue is directly linked to predetonation due to heat. I have zero issues until I'm running it hard consistently. On trips, I'll run pure 93 cause I won't need it. The car is tuned for 93 so I won't run anything else.
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