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| kelley | bp gas | ||
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Guru Newb
 
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filled the truck with gas and the little sign over pump, (MAY contain 10%ethonol),,? what do they mean MAY and what octain does .did they leave the 93 alone? how will that affect the fuel system of the C4,i know my truck is not happy burning it.
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Posted on: 2008/11/23 12:13
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| Matatk | Re: bp gas | ||
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Webmaster
 
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All the gas up here is 10% ethanol - has been for years. It's bad for early multec injectors, but I'm not 100% on the other complications.
Matthew |
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Posted on: 2008/11/23 12:48
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| BillH | Re: bp gas | ||
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The Stig Moderator
 
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I run it all the time in my 92, no problems. I also run the 89 octane.
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Posted on: 2008/11/23 15:48
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| bogus | Re: bp gas | ||
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Grand Imperial Pooh-Bah
 
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10% ethanol is not new and will harm nothing.
The ethanol is being used as an oxygenate to replace MBTE. MBTE was a chemical additive that was found to be very toxic to groundwater. You see, MBTE was molecularly smaller, and it leached out of the underground tanks... very very bad. So they started transitioning to ethanol. BTW, ethanol is also an octane booster. As a reference, Koenigsegg has an exotic that makes 806hp. With E85, it makes 900+. |
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Posted on: 2008/11/23 19:12
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| Schrade | Re: bp gas | ||
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Elite Guru
 
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Quote:
I saw those in VA last week. I saw 'May contain 10% ethanol'. Literally what does it mean? Nothing. Means it may, or may not. Flip a coin. I also saw in VA 'Contains UP TO 10% ethanol' (I think this is what they all are supposed to say). Means it is somewhere between 0% and 10% ethanol. Those are federally mandated notices by the USDA. The former notice will be changed, unless some oil co's are allowed to put in more ethanol for 'tolerance' purposes. |
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Posted on: 2008/11/23 22:14
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| Schrade | Re: bp gas | ||
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Elite Guru
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Quote:
From their website: Quote: The CCXR is the first green supercar in the world and thereby sets a great example for others to follow. Since the ethanol in E85 fuel has a much higher octane rating and internal cooling capacity, the engine can run with higher compression, boost pressure and more spark advance compared to the normal petrol-fuelled CCX, whilst still maintaining the same exhaust temperature. I am obligated to raise the flag on "same exhaust temps".  Their marketing terminology is all wrong. It does NOT boost octane. It might boost the anti-knock rating, because it is less likely to DETONATE, because it has 'less energy'. And as it says "normal petrol...", I need to know the definition of "normal petrol". MAYBE the anti-knock rating is higher of ethanol gas (and maybe it is not). Add alcohol, and it has less 'power'. Absolute energy: Gasoline[4] 46.4 34.2 Gasohol E10 (10% ethanol 90% gas) 43.54 33.72 Gasohol E85 (85% ethanol 10% gas) 33.1 25.65 Heat energy is lower also. Gasoline 47 11.3 20,000 Ethanol 29.8 7.1 12,000 |
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Posted on: 2008/11/24 0:09
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| bogus | Re: bp gas | ||
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Grand Imperial Pooh-Bah
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What is octane? The resistance to detonation. Whatever the way, eh?
I know guys back east who race alcohol burning go-carts, and they are constantly monitoring exhaust temps, because they have a tendency to run very cool. IRL (and former CART) use methenol and they get decent power out of not much engine size. 3.5L V8, normally aspriated (CART was a 2.65L turbo V8) and they are getting 700hp or so (CART was getting 850+). |
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Posted on: 2008/11/24 2:20
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| BillH | Re: bp gas | ||
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The Stig Moderator
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Yep, and a lot of the karts running gas do the same thing especially in road racing with the long straights. With those kart motors, you can adjust both the high speed and low speed jets while driving. You lean out the high speed for max power until you see the EGT start to drop. |
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Posted on: 2008/11/24 15:22
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| djxib | Re: bp gas | ||
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Senior Guru
 
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Regarding BP gas; both my son and I have noticed that our cars seem to run better (stronger, better MPG) using BP premium vs using QT premium. Purely an anecdotal observation, no statistically relevant empirical data (although my son measured an extra 2-3 MPG using BP).
We both now use BP as a preference; I assume, therefore, that so far we have not encountered "10% Ethanol" at our local BP...? |
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Posted on: 2008/11/24 15:40
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| tjpreul | Re: bp gas | ||
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Elite Guru
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Its mandatory to have 10% ethanol here in Missouri. I wish they would let the consumers decide.
The reason for "May contain" is that some suppliers add it, so it can be transported to any state. Where if it did not have the ethanol, they couldn't ship to states like Missouri. |
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Posted on: 2008/11/24 15:47
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| CentralCoaster | Re: bp gas | ||
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Senior Guru
 
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Semantics. Octane isn't something that's added to the gas, it's a measurement taken of knock resistance on a standardized test motor. (A little 1-cylinder motor that costs 10x more than your car.) I believe ethanol production is subsidized, meaning it's not profitable to produce, nor do the oil companies want to produce it. Therefore I would expect the ethanol content to be the minimum required by your local/state/federal environmental agencies. |
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Posted on: 2008/11/24 18:23
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