"Jeff" <kidsdoc2000@[EMAIL PROTECTED]
> wrote in message
news:6qiYi.4532$3j7.4356@[EMAIL PROTECTED]
> SnoMan wrote:
>> On Tue, 6 Nov 2007 16:22:05 GMT, "Steve"
>> <saveongasmormpg@[EMAIL PROTECTED]
> wrote:
>>
>>> 2nd - No longer use the high grade of Gasoline. This in itself saves
>>> quite
>>> a bit of money since 87 octane is ALOT cheaper than 92. Once your
>>> engine is
>>> conditioned to the formula (Which only takes a little while) You can
>>> start
>>> using the cheap gas.
>>
>>
>> Oh I love this one, "conditioned" to use 87 octane.
>
> I noticed that too.
>
> The funny thing is that you save no more money by using 87 octane now
than
> 5 years ago. However, you do say energy, because it takes more energy to
> make higher octane fuel.
>
> Jeff
>
Actually, higher octane fuel is less refined than lower octane. There
may be differences in additives ect, but high octane fuel burns/ignites
slower than low octane. This is why high octane fuel is less likely to
pre-detonate and cause pinging. The main difference between the two is in
the supply/demand arena and not cost to produce since high octane fuel
actually costs less in the production process. When I was still flying a
few
years ago, I remember a breif period when 100 octane LL aviation fuel was
less in cost than 87 octane from the pump...:-). My '95 1500 4x4 has
several
performance add-ons that give me enough of an increase in MPG that using
91
octane actually costs me less per tank than I would with 87 octane. Every
individual vehicle varies in this regard. In our area, 91 octane costs me
only about $5.00 more per tank more than 87 octane, so it doesn't take a
lot
more MPG to break even or come out ahead using higher octane. Going to 93
octane doesn't give me anything more than 91, so I don't go there.
Ed
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