How is octane stored

I wonder if the teams have one blend made and use it for most of the year, or have different blends for different tracks The recommended fuel is Premium. It gets about 1 mpg better economy on Premium, just enough that it is usually worth using the higher octane fuel. My impression is that ethanol is used in every grade of fuel in states with pollution control testing. MTBE is at least partially banned in at least 23 states. I can't remember the last time I saw it listed on a pump left coast driver.

I am pretty sure it has a higher energy content than ethanol, so should get higher MPG. And MTBE has been banned from fuels for a long time, way longer than it's been used for certification fuel around the standards it was written for. Also, gas being "different"- it is, but within a very tight bounds of what is allowed. The real factor in why gas is different is that regional blends are allowed in various parts of the country to try to meet some air quality issues.

Which really isn't refinery related, but area related. And, in these days, isn't as helpful as it used to be. Getting rid of the various blends and resorting to a fixed set of seasonal options like California states would be a net benefit for the entire country. One other thing- octane does NOT indicated how combustible a fuel is, it's a measure of how stable it is when subjected to conditions that can result in knock aka- spontaneous explosion.

F1 is trying to push engine efficiency for normal road cars by spec'ing THE nominal fuel available around the world. I'm glad you mentioned the tanks. When I worked for MerCruiser, the rubber bits weren't the issue.

It was the fiberglass tanks from some companies. Besides gasoline has always had water in it. Assuming the wiring is up to snuff cars always run smoother in the rain. And help prevent knock while cleaning the combustion chamber. Good point on the water absorption. Prior to ethanol being common, it was common to see people add stuff to fuel to soak up the water. Ethanol already does that and for the most part, the water passes through the system harmlessly. It's only an issue if you get so much water in that the fuel separates, but that would be approaching a problematic amount of water sitting in the bottom of the tank without ethanol anyway.

And gas stations still sell the alcohol in a can and people still put in their tanks. The cars continue to run fine.

I guess. Mr Santner might be a Technical Specialist, but he doesn't bother to mention that the number he is talking about is the AKI, not the octane. And his recommendation that you should run 93 AKI in a car which specificies 87? AKI is one measure of octane. It's the average of research octane and motor octane 2 different methods of determining octane. More specifically, US pump rating. Whereas the rest of the world uses RON.

Not sure how that invalidates the entire article, though. I wouldn't say that premium should be ran in all 87 recommended engines, but it doesn't hurt and I think it will clean it but I only run 93 maybe a couple times a year in my "87" vehicles, and run them hard with that tank! And when you try to explain engine compression and how most modern engines are high compression, and that most companies have to add the 87 fuel maps to pull timing since they know people will be cheap and put swill in the tank.

Any of my "premium recommended" cars make a big difference in how they drive, even the transmission shifts at better RPM's in my Yukon. This test is similar to the way the mass of an object can be determined by comparing it to objects references of known mass on a balance scale.

Primary Reference Fuels PRF of precisely known octane are formed by combining iso-octane, heptane, and other well-known standards such as toluene. These PRFs are used to bracket a given fuel sample to determine the pressure at which similar knock intensities are observed.

To determine the RON, the fuel is tested under engine idle conditions with a low air temperature and slow engine speed. To determine the MON the fuel is tested under the more stressful conditions of higher air temperature and engine speed. Current designs see image below allow the same engine to perform both tests.

Despite this flexibility, many testers still prefer to use more than one machine with each specifically set up and calibrated to perform either RON or MON tests. Gasoline explained. What is energy?

Units and calculators. Use of energy. Energy and the environment. Also in What is energy? Forms of energy Sources of energy Laws of energy. Also in Units and calculators explained Units and calculators Energy conversion calculators British thermal units Btu Degree days. Also in U. Also in Use of energy explained Use of energy Energy use in industry Energy use for transportation Energy use in homes Energy use in commercial buildings Energy efficiency and conservation. Also in Energy and the environment explained Energy and the environment Greenhouse gases Greenhouse gases and the climate Where greenhouse gases come from Outlook for future emissions Recycling and energy.

In this example, high would be around 12 psi. Depending on county and state, pump fuel vapor pressures are limited to a 7.

The main fuel component used to adjust vapor pressure is butane, which is very combustible. Butane is very useful for maintaining octane levels when blending fuels to work in cold weather.

The primary issue with using butane is that it boils above freezing when exposed to the atmosphere. Ter Haar. Degraded MMT will settle to the bottom of the container as a rust colored material that can clog fuel lines and filters.

Extra care needs to be used when storing and handling MMT fuels in order to minimize contact with sunlight. The additive is stable in gasoline as long as no UV light hits the fuel.

Octane stability is greatly affected by the storage conditions. Proper storage can preserve octane for years but improper storage can reduce octane and degrade fuel within weeks.

That is why we provide proper storage information on our website. Click here to view our storage recommendations. Special thanks goes to Minnesota State University Mankato, Automotive Engineering Technology students for suggesting the topic of this article.

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