Premium fuel in the GX470 necessary?

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Old 03 Dec 2003, 08:59 pm   #1 (permalink)
James P. Clark
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Default Premium fuel in the GX470 necessary?

I've got a GX470 on order and should be picking it up next week. I know that Lexus recommends premium gas be used, but I'm wondering if there would be ill effects in using regular octane gas instead?

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Old 03 Dec 2003, 10:09 pm   #2 (permalink)
rubio
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Default Re: Premium fuel in the GX470 necessary?

trust me you have to use premium and i mean mobile,shell,amoco,thats it
"James P. Clark" <james.clarkANTI@SPAMadelphia.net> wrote in message
news:zywzb.8695$zL1.1747283@news1.news.adelphia.ne t...
I've got a GX470 on order and should be picking it up next week. I know that
Lexus recommends premium gas be used, but I'm wondering if there would be
ill effects in using regular octane gas instead?

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Old 04 Dec 2003, 02:36 am   #3 (permalink)
markjen
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Default Re: Premium fuel in the GX470 necessary?

The general rule of thumb on recent cars is that you can use regular, but
you'll reduce performance about as much as you'll save in gas. So if you
don't want/need/use all the performance of your GX, go for it. But it
always seems like weird economy to spend big money on a high-performance
vehicle to feed it cheap gas that turns it into a cheaper, lower-performance
vehicle.

- Mark


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Old 04 Dec 2003, 03:48 pm   #4 (permalink)
John
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Default Re: Premium fuel in the GX470 necessary?

If you like your car's engine, use premium, it's worth it. I doubt the few
dollars saved relative to the cost is significant... or... penny wise, pound
foolish.


"James P. Clark" <james.clarkANTI@SPAMadelphia.net> wrote in message
news:zywzb.8695$zL1.1747283@news1.news.adelphia.ne t...
I've got a GX470 on order and should be picking it up next week. I know that
Lexus recommends premium gas be used, but I'm wondering if there would be
ill effects in using regular octane gas instead?

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Old 04 Dec 2003, 04:39 pm   #5 (permalink)
MCAS NV
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Default Re: Premium fuel in the GX470 necessary?

i switched to regular in my '91 LS400 and I haven't noticed anything different
at all. No knocking or pinging at all.
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Old 04 Dec 2003, 05:21 pm   #6 (permalink)
Dan J.S.
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Default Re: Premium fuel in the GX470 necessary?


>"James P. Clark" <james.clarkANTI@SPAMadelphia.net> wrote in message

news:zywzb.8695>$zL1.1747283@news1.news.adelphia.n et...
>I've got a GX470 on order and should be picking it up next week. I know

that Lexus recommends premium gas be used, but I'm >wondering if there would
be ill effects in using regular octane gas instead?

You do not need to use premium. The engine down-tunes itself for lower
octance gas, with no ill-effects.

Dan




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Old 04 Dec 2003, 07:51 pm   #7 (permalink)
wideglide01diespammers@cox.net
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Default Re: Premium fuel in the GX470 necessary?

Ignoring his agents wishes,"John" <bounce@here.org> flung open the
hotel room door and announced to the gathering crowd:

>If you like your car's engine, use premium, it's worth it. I doubt the few
>dollars saved relative to the cost is significant... or... penny wise, pound
>foolish.
>


you will *not* damage your engine by going with a lower octane fuel.
You *can* damage your engine by going with too *high* of an octane
fuel for an engine that's not designed for it. Higher octane is to
prevent predetonation in a higher compression engine. If you don't
have a high compression engine or if you're not getting any knocking,
you're not going to lose losing power and your not going to hurt your
engine.




>
>"James P. Clark" <james.clarkANTI@SPAMadelphia.net> wrote in message
>news:zywzb.8695$zL1.1747283@news1.news.adelphia.n et...
>I've got a GX470 on order and should be picking it up next week. I know that
>Lexus recommends premium gas be used, but I'm wondering if there would be
>ill effects in using regular octane gas instead?




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Old 04 Dec 2003, 08:30 pm   #8 (permalink)
Carl
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Default Re: Premium fuel in the GX470 necessary?

If you ask 3 people this question, you'll get 4 different answers.

I switched to regular in both my GX and LS430 a long time ago, and have experienced nothing but lower gas bills. No performance problems, no engine damage, no nothing, just plain old lower costs.

Do what you want, and don't let the zealots push you around!

Carl
"James P. Clark" <james.clarkANTI@SPAMadelphia.net> wrote in message news:zywzb.8695$zL1.1747283@news1.news.adelphia.ne t...
I've got a GX470 on order and should be picking it up next week. I know that Lexus recommends premium gas be used, but I'm wondering if there would be ill effects in using regular octane gas instead?

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Old 04 Dec 2003, 10:13 pm   #9 (permalink)
wideglide01diespammers@cox.net
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Default Re: Premium fuel in the GX470 necessary?

Ignoring his agents wishes,"Carl" <a@b.com> flung open the hotel room
door and announced to the gathering crowd:

>If you ask 3 people this question, you'll get 4 different answers.
>
>I switched to regular in both my GX and LS430 a long time ago, and have experienced nothing but lower gas bills. No performance problems, no engine damage, no nothing, just plain old lower costs.
>
>Do what you want, and don't let the zealots push you around!
>
>Carl
> "James P. Clark" <james.clarkANTI@SPAMadelphia.net> wrote in message news:zywzb.8695$zL1.1747283@news1.news.adelphia.ne t...
> I've got a GX470 on order and should be picking it up next week. I know that Lexus recommends premium gas be used, but I'm wondering if there would be ill effects in using regular octane gas instead?
>
> --
> Please remove all UPPERCASE letters in the reply email address!


"Are you tempted to buy a high octane gasoline for your car because
you want to improve its performance? If so, take note: the recommended
gasoline for most cars is regular octane. In fact, in most cases,
using a higher octane gasoline than your owner's manual recommends
offers absolutely no benefit. It won't make your car perform better,
go faster, get better mileage or run cleaner. Your best bet: listen to
your owner's manual."

......however...

"What's the right octane level for your car?
Check your owner's manual to determine the right octane level for your
car. Regular octane is recommended for most cars. However, some cars
with high compression engines, like sports cars and certain luxury
cars, need mid-grade or premium gasoline to prevent knock"

.....but....

"Should you ever switch to a higher octane gasoline?
A few car engines may knock or ping - even if you use the recommended
octane. If this happens, try switching to the next highest octane
grade. In many cases, switching to the mid-grade or premium-grade
gasoline will eliminate the knock. If the knocking or pinging
continues after one or two fill-ups, you may need a tune-up or some
other repair. After that work is done, go back to the lowest octane
grade at which your engine runs without knocking."


from: "The Low-Down on High Octane Gasoline"

http://www.ftc.gov/bcp/conline/pubs/autos/octane.htm





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Old 05 Dec 2003, 01:02 am   #10 (permalink)
sf/gf
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Default Re: Premium fuel in the GX470 necessary?


<wideglide01diespammers@cox.net> wrote in message
news:rflvsvsul9klcrf91ohfb8tra90a2dnv3m@4ax.com...

>
>
> You *can* damage your engine by going with too *high* of an octane
> fuel for an engine that's not designed for it. Higher octane is to


>
>
> ************************************************** ********************
>


Please explain how using too high of an octane fuel can damage an engine.
Although it may not make sense from an economic viewpoint, the only
difference between low octane and higher octane is that higher octane burns
slower (which is why it pings and knocks less). Some say higher octane also
has higher detergent levels, but I have never been able to verify this.

For what it is worth, in my GS 300, it recommends premium for best
performance but does not rule out lower octane fuels. I have tried regular,
mid-grade and premium and can not tell any difference in performance. So, I
compromise and use mid-grade. Most modern engines have the ability to sense
knock/ping and will automatically retard the ignition timing to compensate
for the lower octane fuel, with maybe a slight degree of reduced
performance.
Steve


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