What does 93,97... Etc., mean in the High octane fuel ?
401397
The octane number tells you the weight percent of isooctane in the fuel. For example, 93 means that 93 wt% is isooctane and the remaining 7 wt% is another hydrocarbon.\n\n"Fuels with high octane ratings allow higher engine pressure ratios to be used. Engines that have been designed to exploit this benefit have higher efficiencies and power outputs. This is the reason why sports cars often require gasoline with a high octane number." - VisionEngineer.com
374376
To Prove to the Right People that My Compact, Safe, Low Pressure Unit can Turn Regular Pump Gasoline into Propane. I've already Accomplished it. The Problem is the Fact that all Vehicles from 1996 to the Present are Required by the Stringent EPA  OBD II Law to Run at 14.7 Parts of Air to 1 Part of Fuel, or the vehicle will Fail Inspection . Even if Fuel Economy is Markedly Improved, and Emissions Lowered, the Vehicle will fail Inspection because by Law, there is a maximum, and a Minimum Limit. Deviate from Either Parameter and the Vehicle will Fail Inspection. This is Insane! I've been to the US Patent Office and Looked at the Patents for Other Similar Units that have been kept off the Market.The Pogue Carburetor, which is Patented, is Documented to Provide 100 + MPG with a Flat-Head Ford V-8 Engine, that's usually 15 MPG, or Less! We have got to Reduce Dependence on Petroleum Worldwide, Vehicle Emissions, and Global Warming. That's the Dream , and the "Why". So, How am I Doing? 14.7 to 1 is the Law. I've Managed to prove 100 to 1 is Possible, but it's a Losing Proposition at this Point. For even More,http://energy21.freeservers.com/bookrep.html Hybird Vehicles aren't the Answer.At Highway Speed, the Gas Engine takes Over, plus the Heavy Batteries have to be Hauled.Cheap, Safe Hydrogen is the Answer, but as long as there is a High level of Profit in Petroleum, nothing will Change, including the insane EPA OBD II Law.So, I'm not doing very well at this Point. Maybe with the Power of the Internet that will Change.
380440
There really isn't much. All gasoline has to meet federal standards. Go for price.
501724
Converting Gasoline into Propane so all USA Vehicles could get 50 + MPG! But, the Clinton/Gore EPA-OBD II Law that applies to Your Vehicle is Stopping Me! Want to Know More? Go to http://energy21.freeservers.com/bookrep.html
1126751
Check with the ISA publication: Instrumentation Symbols and Identification ISA-5.1-1984.\n\nThe API (American Petroleum Institute) may also have some publications.
437848
Find Some Way to Contact the Right Person[s] not Obsessed with Greed and Money that could Help Me get the Word Out that We are ALL being Ripped Off. How ? I've Found a Way to Convert Regular Pump Gasoline into Propane. My Unit is very Compact, Safe, and Mixes in Low Pressure Air, Within Most any Vehicle. This Produces 100 Parts of Air to 1 Part of Fuel. You Want Numbers ? 50 + MPG with even the largest Gasoline Powered SUV ! Here's the Problem, all Vehicles in the U.S.A. are Required by Law to Conform to the EPA-OBD II Law. That Law Explicitly States that all Vehicles Made from 1996 to the Present must Run at 14.7 Parts of Air to 1 Part of Fuel. Even if Fuel Economy is Improved, and Emissions are Lowered, any Alteration of any OBD-II Vehicle will Result in a Failed Inspection. Then, it's Illegal to Operate! When that "Big-Brother" Machine gets Hooked Up to any '96 on Up Vehicle, it must be Factory Original.This is Insane! I can Understand a Maximum Limit on Emissions for the Good of the Environment, but to Fail Inspection for not Emitting enough Pollution ? I've been to the US Patent Office, and Looked at other Units that have been Bought  Out, and Kept off the Market, so, for This, don't even go There! If I'm Wrong, then how is it that Engines do Run on Propane? By Conventional, Legal Means this involves using a Large, Expensive, Cumbersome Tank that has to be Hauled in the Vehicle, Expensive Metering Equipment, and the Hassle of Refilling the Tank. So Much Hassle that even with Gas going back up to $3.OO Per Gallon, it's just not Worth it. Hybirds? Great, in Town, but on the Highway, the Gas Engine takes over, plus Heavy, Expensive Batteries have to be Hauled. What I would Like to do Today is to get the Word out that all Petroleum is essentially the same. Only the Molecular Dispersal is Altered.It all comes from the same Place.If Gasoline to Propane Conversion were Legal, it would go a long way toward ending Dependency on Imported Oil, and Reducing Air Pollution, and Global Warming.Cheap, and Safe Hydrogen is the Ultimate Answer. Until the Big Profit is taken out of Big Oil, nothing will ever Change. Also http://energy21.freeservers.com/bookrep.html gives even more Insight. If I at least got the "Word" out to You, then I did what I wanted to do Today ! Thanks!
75355
Short answer: yes.\n\nOctane levels are based on what is called a "knock resistance."  When an engine burns gas, the smaller the gas molecules, the quicker it will burn.  If it burns too quickly, the energy will be released faster than the piston can use the energy.  The excess energy makes the piston rattle in the chamber, "knocking" back and forth--if you've ever heard a sound like rattling marbles in the engine of an old car climbing a hill, you know what I mean here.\n\nOctane is a hydrocarbon with eight carbon atoms (hence the "oct" prefix).  But gasoline that you get at the pump is not pure octane--it contains some lighter stuff (like hexane and septane) and some heavier stuff (like novane and decane).  Plus, there are aspects of whether the molecules in the gas are in straight chains or in branched chains.  But when a consumer buys gasoline, they need some sense of what they're getting to make sure that they're not getting crap that will burn too quickly and mess up their engine.  So instead of trying to make all gas pure octane (which would be ridiculously expensive and wasteful), or trying to give a consumer a detailed assay of the types of hydrocarbons in the gas (which would be meaningless for the consumer and likewise expensive), they formulate the gas into certain knock ratios.  The speed of burning is measured against 2,2,4-trimethylpentane (a type of octane) and n-pentane.  So 87 octane gas knocks as much as a mixture of 13% pentane and 87% octane, etc.  They compare the knocking effect.\n\nEthanol helps to slow down the burning of the gas, and does work as an actane booster.  The follwing link says that 10% ethanol added to 92 octane will give an octane rating of 94.7, but warns that ethanol is mildly corrosive to some engine parts.
377380
My favourite number is 97, dunno why.
738607
the number '194'\n\n=)
932842
Darn!  Yahoo did it again; I spend half an hour figuring this stupid thing out, and they ask for my password and delete it!\n\nThe answer is 786.8 L*atm per L of liquid octane.\n\nI don't have the time to go through it again, sorry.
632382
Carbon rating is similar to Octane number.  Octane Number = Carbon rating of a gases quality / 100.  (The octane rating of gasoline tells you how much the fuel can be compressed before it spontaneously ignites. When gas ignites by compression or a spark source, and the bonds inbetween the hydrocarbons are broken, a certain amount of energy is released. The more bonds in the hydrocarbon chain that can be broken in this combustion event, the higher the carbon rating and the more bang for your buck.) Out of 100% of combusting gasoline fuel for example, 0% heptane is a very poor source of energy and pumps wouldn't dare try to sell it as useable fuel. While a rating of 86, 87, 88 / 100 is pretty good, hence the rating at the pump. \n\nSo, I guess you can think of the carbon rating of a fuel as the percent efficiency of that fuel during 100% combustion.
792557
ok, here ya go:\n\nhttp://www.fuelcellsworks.com/Supppage5336.html
511271
It is a quality standard developed to assure quality of the welded products.\n\nDIN EN 729 is also published as ISO 3834.
959805
HBr, -1\nHOBr, +1\nBr2, 0\nHBrO4,  +7\nBrF3  +3\n\nThere is nothing to explain.  There are rules, and you need to learn them and follow them.\n\nHere is a site with a good set of rules\nhttp://www.science.uwaterloo.ca/~cchieh/cact/c123/oxidstat.html
520823
It depends on the quality of the engine. The lowest price of unleaded is fairly high quality feul. It will explode easier and more powerfully. However engine feul misfires are far more likely. A lower quality engine will have a much much lower performance. \n\nThen there is E10, 90% unleaded and 10% ethanol. Ethanol has a higher octane. At 10% it doesn't reduce feul performance by much, certainly not by more than other fuel additives do. Higher octane means less engine misfires because higher octane fuels are less likely to explode for anything but a spark. Most engines have moderately better performance with this fuel. \n\nThen there is E85. 85% ethanol and 15% gasoline. The performance of this fuel is about 30% less than E10. Only flex fuel vehicles. Technically this fuel is less expensive than gasoline, but the market demand of this fuel is far to high to reflect this at the pump. \n\nEthanol is a good fuel. It is efficient according to the USDA. It is terribly inefficient according to the oil industry(ethanol's competition) and researchers working for the oil companies. USDA says that ethanol has 67% more energy than the energy used to produce that ethanol.
276047
From looking around, I would believe it's a canadian classification for fireworks/explosives, but I can't seem to find a direct link to the canadian references.\n\nAh, found it.  Look at part 3b, and you'll see that 7.2.3 covers Single Use Standard E & F Motors
693408
It's not nitrogen... It's hydrogen. They called my car the "Hindenburg" after it burst into flames when I pumped in a few pounds too many way back when in Lakehurst, New Jersey... Oh, the humanity!