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David Z

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Since: May 04, 2004
Posts: 124



(Msg. 1) Posted: Wed Dec 03, 2008 3:21 pm
Post subject: Octane
Archived from groups: alt>autos>lexus (more info?)

Lexus recommends 91 octane or above for my 2004 ES330. My experience is
that I get better mileage (and less hesitation/jerking) using premium gas
(93 octane) than using regular gas (87 octane).

Virtually every gas station around me offers 3 grades of gas -- 87, 89 and
93 octane. Does anyone here fill up their tank with two-thirds 93 octane
and one-third 87 octane to get a "blend" of 91 octane?

It seems like a bit of a hassle to save about a dollar a tank, but I was
wondering if anyone has tried it and what their experience has been.

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Ray O

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Since: Oct 25, 2008
Posts: 71



(Msg. 2) Posted: Wed Dec 03, 2008 5:02 pm
Post subject: Re: Octane [Login to view extended thread Info.]
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"David Z" wrote in message

> Lexus recommends 91 octane or above for my 2004 ES330. My experience is
> that I get better mileage (and less hesitation/jerking) using premium gas
> (93 octane) than using regular gas (87 octane).
>
> Virtually every gas station around me offers 3 grades of gas -- 87, 89 and
> 93 octane. Does anyone here fill up their tank with two-thirds 93 octane
> and one-third 87 octane to get a "blend" of 91 octane?
>
> It seems like a bit of a hassle to save about a dollar a tank, but I was
> wondering if anyone has tried it and what their experience has been.

I just use the mid-grade fuel and do not have any problems with performance,
hesitation, etc. in my LS.

--

Ray O
(correct punctuation to reply)

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johngdole

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Since: Jul 26, 2005
Posts: 780



(Msg. 3) Posted: Thu Dec 04, 2008 12:14 am
Post subject: Re: Octane [Login to view extended thread Info.]
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If the Toyota engine doesn't perform smoothly with 87 then it's a
design problem with the engine, not the fuel. Modern cars do adapt
without problems, including Porsche. Yes, I agree that you may lose a
bit of power and mileage, but it's very slight in typical driving.

Go ahead and read the USA Today article and decide for yourself,
http://www.usatoday.com/money/autos/2003-07-30-premiumgas_x.htm

"I personally use regular even though my owner's manual says you'll
get better performance with premium," says Lewis Gibbs, consulting
engineer and 45-year veteran at Chevron oil company. He's chairman of
Technical Committee 7 on Fuels, part of the Society of Automotive
Engineers (SAE) Fuels & Lubricants Council. Gibbs knows gas.

"My wife runs midgrade (89 octane) in her car, and it's a turbocharged
engine" meant for 91-octane premium, he says.




On Dec 3, 7:21 am, "David Z" wrote:
> Lexus recommends 91 octane or above for my 2004 ES330.  My experience is
> that I get better mileage (and less hesitation/jerking) using premium gas
> (93 octane) than using regular gas (87 octane).
>
> Virtually every gas station around me offers 3 grades of gas -- 87, 89 and
> 93 octane.  Does anyone here fill up their tank with two-thirds 93 octane
> and one-third 87 octane to get a "blend" of 91 octane?
>
> It seems like a bit of a hassle to save about a dollar a tank, but I was
> wondering if anyone has tried it and what their experience has been.
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Colin

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Since: Dec 04, 2008
Posts: 1



(Msg. 4) Posted: Thu Dec 04, 2008 1:25 am
Post subject: Re: Octane [Login to view extended thread Info.]
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"Ray O" wrote in


>
> "David Z" wrote in message
>
>> Lexus recommends 91 octane or above for my 2004 ES330. My experience
>> is that I get better mileage (and less hesitation/jerking) using
>> premium gas (93 octane) than using regular gas (87 octane).
>>
>> Virtually every gas station around me offers 3 grades of gas -- 87,
>> 89 and 93 octane. Does anyone here fill up their tank with
>> two-thirds 93 octane and one-third 87 octane to get a "blend" of 91
>> octane?
>>
>> It seems like a bit of a hassle to save about a dollar a tank, but I
>> was wondering if anyone has tried it and what their experience has
>> been.
>
> I just use the mid-grade fuel and do not have any problems with
> performance, hesitation, etc. in my LS.
>

I use 87 on my LS - no problems. I tested the fuel economy a while ago with 93 octane and 87. Filled the
tank with 03 (after it was almost empty) and recorded the mpg per tank than did the same with 87. Both
times driving the same route: a 1000 miles from Delaware to Michigan. The result was 2% or less
difference. I am using 87 now.

--
Read and be merry http://blog.rankarmor.com
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Elmo P. Shagnasty

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Since: Feb 15, 2004
Posts: 1032



(Msg. 5) Posted: Thu Dec 04, 2008 12:31 pm
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David Z

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Since: May 04, 2004
Posts: 124



(Msg. 6) Posted: Sat Dec 06, 2008 3:49 am
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"Elmo P. Shagnasty" wrote in message

> In article
> ,
> wrote:
>
>> If the Toyota engine doesn't perform smoothly with 87 then it's a
>> design problem with the engine, not the fuel. Modern cars do adapt
>> without problems, including Porsche. Yes, I agree that you may lose a
>> bit of power and mileage, but it's very slight in typical driving.
>
> It's all about the COST PER MILE, people. Don't worry about the mileage
> in and of itself. It's the cost per mile to fuel the car.
>
> Not all fuel is the same. You'd see a difference between, say, Shell
> gas and grocery store gas, all at 87 octane.
>
> And the ONLY way to measure it decently is to run several tanks of each
> gas and measure it carefully.

Good idea in theory. However, it's impossible to drive exactly the same on
two different tanks of gas. Anyone who thinks they can do that and use the
data to gage small differences in mileage is kidding themselves.

Also, it's not only about cost. It's about performance, too.
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Elmo P. Shagnasty

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Since: Feb 15, 2004
Posts: 1032



(Msg. 7) Posted: Sat Dec 06, 2008 1:16 pm
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David Z

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Since: May 04, 2004
Posts: 124



(Msg. 8) Posted: Sun Dec 07, 2008 12:07 am
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"Elmo P. Shagnasty" wrote in message

> In article ,
> "David Z" wrote:
>
>> >> If the Toyota engine doesn't perform smoothly with 87 then it's a
>> >> design problem with the engine, not the fuel. Modern cars do adapt
>> >> without problems, including Porsche. Yes, I agree that you may lose a
>> >> bit of power and mileage, but it's very slight in typical driving.
>> >
>> > It's all about the COST PER MILE, people. Don't worry about the
>> > mileage
>> > in and of itself. It's the cost per mile to fuel the car.
>> >
>> > Not all fuel is the same. You'd see a difference between, say, Shell
>> > gas and grocery store gas, all at 87 octane.
>> >
>> > And the ONLY way to measure it decently is to run several tanks of each
>> > gas and measure it carefully.
>>
>> Good idea in theory. However, it's impossible to drive exactly the same
>> on
>> two different tanks of gas.
>
> But if you do each gas over several tanks, it all comes out in the wash.
> Overall, over a couple thousand miles per type of gas, your driving is
> generally all the same.

That's about as scientific as astrology. It would be foolish to rely on
such data.

>> Also, it's not only about cost. It's about performance, too.
>
> And you'll discover that, too.

Apparently you haven't discovered it yet. That's why, in response to "you
may lose a bit of power and mileage," you said "It's all about the COST PER
MILE, people" (see above, you know, the part you deleted).
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Elmo P. Shagnasty

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Since: Feb 15, 2004
Posts: 1032



(Msg. 9) Posted: Sun Dec 07, 2008 2:38 pm
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Elmo P. Shagnasty

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(Msg. 10) Posted: Sun Dec 07, 2008 2:39 pm
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David Z

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Since: May 04, 2004
Posts: 124



(Msg. 11) Posted: Sun Dec 07, 2008 3:47 pm
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"Elmo P. Shagnasty" wrote in message

> In article ,
> "David Z" wrote:
>
>> > But if you do each gas over several tanks, it all comes out in the
>> > wash.
>> > Overall, over a couple thousand miles per type of gas, your driving is
>> > generally all the same.
>>
>> That's about as scientific as astrology. It would be foolish to rely on
>> such data.
>
> To the thousandths place, sure.
>
> But try it--you'll be surprised at the information you can glean.

Nonsense. Astrologists make the same claim.
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David Z

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Since: May 04, 2004
Posts: 124



(Msg. 12) Posted: Sun Dec 07, 2008 3:50 pm
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"Elmo P. Shagnasty" wrote in message

> In article ,
> "David Z" wrote:
>
>> >> Also, it's not only about cost. It's about performance, too.
>> >
>> > And you'll discover that, too.
>>
>> Apparently you haven't discovered it yet. That's why, in response to
>> "you
>> may lose a bit of power and mileage," you said "It's all about the COST
>> PER
>> MILE, people" (see above, you know, the part you deleted).
>
> It's not about the MILEAGE, it's about the COST PER MILE. People think
> "oooo, I'm getting 2mpg better" then they never factor in the cost of
> getting that extra 2mpg.

I taught you well, I see.

> Performance is a completely different, and subjective, matter.
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Elmo P. Shagnasty

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Since: Feb 15, 2004
Posts: 1032



(Msg. 13) Posted: Mon Dec 08, 2008 2:37 am
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David Z

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Since: May 04, 2004
Posts: 124



(Msg. 14) Posted: Mon Dec 08, 2008 3:00 am
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"Elmo P. Shagnasty" wrote in message

> In article ,
> "David Z" wrote:
>
>> > It's ALL about the cost per mile.
>>
>> It's also about performance. And yours is very predictable.
>
> Your wife complained to me just last night about your performance.

Like I said, very predictable.
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Elmo P. Shagnasty

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Since: Feb 15, 2004
Posts: 1032



(Msg. 15) Posted: Mon Dec 08, 2008 11:15 am
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