Re: better mileage with higher octane?

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Re: better mileage with higher octane? lp13-30 01-13-2007
Posted by lp13-30 on January 13, 2007, 12:09 am
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This is a very interesting and informative thread-as is the group here
as a whole. Here in S Tx. 87 octane is $2.05 at a few independent
stores, the major chains are mostly in the $2.12-2.17 range. At at least
95%, the difference between grades is a dime, so it really wouldn't take
a very big increase in mileage to be cost effective. The problem is that
such a small increase would be hard to accurately determine, given all
the variables affecting gas mileage. I would imagine that even the
temperature would affect octane requirements. In desert areas where it
may be 70 in the morning and 100+ in the afternoon, it may not be cost
effective on the way to work, and the opposite on the way home. The
funny thing is that there was a dime difference between grades when gas
was $1.00, and also when it was $3.00, but as the price was climbing
towards $3..00 (about as high as it got here) people started buying 87
octane instead of 89 or 91, when it is actually a better deal as the
price increases. I have a company van and they use 87 octane, and the
only gas burner I have is a Ford Aspire, so do spend much on gas. Diesel
is another story tho-- got a couple and have some questions. since there
seem to be some pretty sharp gearheads in here, let me know if it is ok
to ask in this thread --or at all. Larry


Posted by Solar Flare on January 14, 2007, 3:28 pm
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No demand for the big octane = lower price.

Demonstrates the oil companies can charge what they want.

> This is a very interesting and informative thread-as is the group
> here
> as a whole. Here in S Tx. 87 octane is $2.05 at a few independent
> stores, the major chains are mostly in the $2.12-2.17 range. At at
> least
> 95%, the difference between grades is a dime, so it really wouldn't
> take
> a very big increase in mileage to be cost effective. The problem is
> that
> such a small increase would be hard to accurately determine, given
> all
> the variables affecting gas mileage. I would imagine that even the
> temperature would affect octane requirements. In desert areas where
> it
> may be 70 in the morning and 100+ in the afternoon, it may not be
> cost
> effective on the way to work, and the opposite on the way home. The
> funny thing is that there was a dime difference between grades when
> gas
> was $1.00, and also when it was $3.00, but as the price was climbing
> towards $3..00 (about as high as it got here) people started buying
> 87
> octane instead of 89 or 91, when it is actually a better deal as the
> price increases. I have a company van and they use 87 octane, and
> the
> only gas burner I have is a Ford Aspire, so do spend much on gas.
> Diesel
> is another story tho-- got a couple and have some questions. since
> there
> seem to be some pretty sharp gearheads in here, let me know if it is
> ok
> to ask in this thread --or at all. Larry
>



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