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Anecdotal evidence suggests that using petrol blended with ethanol does not really provide any financial advantage because the vehicle consumes more thereby negating any advantage over petrol with no ethanol at all. The jury is still out on this but I personally do not fill up any of my cars with ethanol-blended fuel. And I only go to reputable petrol stations.
Unfortunately, we don't have that choice in most of the USA. The farmers corn lobby is quite powerful. If you can find non ethanol gas (lots of stations near the coast have it for boats), the cost is higher than premium and the octane is about the same as regular. Now they are talking about increasing the amount of ethanol. Lunacy!
 

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I was just reading my user manual and came across the Research Octane Numer (RON). It recommends a minimum RON of 95. I believe this is equivalent to Octane Rating of 90 in the U.S.
If this is the case would ther be any issues down the track if it's filled up with lower Octane Rating or RON?
 

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I was just reading my user manual and came across the Research Octane Numer (RON). It recommends a minimum RON of 95. I believe this is equivalent to Octane Rating of 90 in the U.S.
If this is the case would ther be any issues down the track if it's filled up with lower Octane Rating or RON?
In the US, it recommends 87, which is the lowest.
 

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I was a huge Chevron fan boy until one day I gave costco a try. Long story short, no negative impact to mpgs, no diff in performance, no odors/smells.
The only problem with Costco is the wait and no windshield squeegee. :p There are at least 4 or 5 cars waiting on each of the 2 pumps line. My wife goes to Costco to fill up on her SUV which takes 25+ gallons. It was worth the wait. On the CT, I feel like I am wasting my time when I could only put in 8-9 gallons after a 15 to 20 minutes wait!
 

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News of 30 Jan 2013: US report finds ethanol may damage fuel pumps

Here's an extract of the news:

Ethanol-blended petrol may damage car engines by harming fuel pumps, according to a US study funded by oil refiners and car makers.

"The industry groups have opposed the standard set by the Environmental Protection Agency that allows so-called E15 blended fuels, which contain up to 15 per cent ethanol.

"But while the EPA cleared the E15 blend for most vehicles sold since 2001, the study released by the Coordinating Research Council shows it may cause fuel-pump failures, component swelling and problems that could trigger on-board diagnostic system breakdowns.
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‘‘Given the types of vehicles tested, it’s safe to say that millions could be affected,’’ Bob Greco, the American Petroleum Institute’s downstream group director, told reporters.

‘‘The more we study, unfortunately, the more difficult issues we uncover.’’

Ethanol, fermented from molasses, wheat starch or sorghum, is seen by many as an effective way of reducing greenhouse gas emissions.


In the US, E10 can be sold without any advisory stickers, but the EPA and the Federal Trade Commission require E15 sellers to post a ‘‘prominent orange and black label’’ to let consumers know a pump contains the higher concentration of ethanol.

Supporters of its use say refiners are funding studies such as the one released today by the Coordinating Research Council in their bid to overturn the Renewable Fuel Standard, either in court challenges or through legislation.

‘‘This is more of the same old junk science, recycled by oil companies to continue to attack biofuels, which are cutting into their market segment and bottom line,’’ Michael Frohlich, a spokesman for the ethanol-industry group Growth Energy, said in an e-mail.

‘‘I am surprised that the CRC has not attempted to provide ’scientific’ data that links E15 to flat tyres."
 

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Ethanol-blended petrol may damage car engines by harming fuel pumps, according to a US study funded by oil refiners and car makers.
This is hilarious. I stopped reading once I saw this. Basically means this information is a big pile of $&@?. A study funded by oil refiners and car makers??? Let's see the oil refiners are paying off the car makers which mean their profits go down when more ethanol is used. Nice try


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I use only Shell when I can. It's better for your car in the long run, and highly recommended by my Lexus service manager.
Utter non-sense. Gasoline all comes from the same place. Different companies put different additives but the gas itself is all the same. The only thing that really matters is that you buy your gas from a busy station. As gas gets old it goes bad. You and your service manager have been brainwashed by the oil company and their ad campaign, my friend. Buy regular gas at the busiest station around, you'll be fine.
 
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