Regular gas in Premium engines
JRStern
premium, say the Type S Acura?
I figure the computers will retard timing and pretty much eliminate
knock, at the cost of some performance. Anybody have occassion to try
this?
Would it void the warranty?
Not that I would ever do this, ... I don't think.
J.
Timothy J. Lee
JRStern <JXSternC...@gte.net> wrote:
>What happens these days if you put regular gas in an engine built for
>premium, say the Type S Acura?
>
>I figure the computers will retard timing and pretty much eliminate
>knock, at the cost of some performance. Anybody have occassion to try
>this?
Car and Driver's November 2001 issue has an article about that subject.
It is on its web site.
--
------------------------------------------------------------------------
Timothy J. Lee
Unsolicited bulk or commercial email is not welcome.
No warranty of any kind is provided with this message.
JRStern
wrote:
>>What happens these days if you put regular gas in an engine built for
>>premium, say the Type S Acura?
>>
>>I figure the computers will retard timing and pretty much eliminate
>>knock, at the cost of some performance. Anybody have occassion to try
>>this?
>
>Car and Driver's November 2001 issue has an article about that subject.
>It is on its web site.
Well, these guys say you lose about 10%. Technically, that's pretty
darn kewl, actually. They don't address the warranty. Thanks for the
pointer.
J.
Curtis Newton
>>Car and Driver's November 2001 issue has an article about that subject.
>>It is on its web site.
>
>http://www.caranddriver.com/xp/Caranddriver/features/2001/november/200111_feature_gasoline.xml?keywords=premium
>
>Well, these guys say you lose about 10%. Technically, that's pretty
>darn kewl, actually. They don't address the warranty. Thanks for the
>pointer.
>
From a warranty perspective, how could they prove it? If something
were to go wrong, couldn't you just ensure you fill up with premium or
throw in a can of octane enhancer (104+ or whatever) if you ever had
to take the car in with problems??
-
--
Curtis Newton
cne...@akamail.com
http://surf.to/cnewton
JRStern
wrote:
>From a warranty perspective, how could they prove it? If something
>were to go wrong, couldn't you just ensure you fill up with premium or
>throw in a can of octane enhancer (104+ or whatever) if you ever had
>to take the car in with problems??
Well, yeah. My real question is whether the manufacturer thinks it's
an OK thing to do, technically.
J.
tomk
recommend it.
just cause you have airbags doesn't mean they recommend
hitting a wall at 30mph(unless your a crash tester)
"JRStern" <JXSternC...@gte.net> wrote in message
news:3cabc89a...@news.verizon.net...
Majiin Will
recently, when I a friend recommended I use the highest grade - 93. His
reasoning was that it would be easier on my engine, would improve
performance and would last longer, which meant I'd save more in the long
run.
Is that true?
--
#15 o n L v u b u n s T o p 9 7 3 R S P W P o s t e r s
Watchin' kids freeze in winters, they still poor
How could I tease them with Benz's and feel no remorse (Nas)
mac west
They know people do that so this is why the computer retards the
timing by the knock sensor . As long as the timing retards no damage
will occur.
xxxxxxxx
87 octane . The on board computer just retards the timing a tad and there is
some power loss.
ed/ontario
xxxxxxxx
Majiin Will <Ow...@Gerrard.Hyypia.Anfield> wrote in message
news:a8gnpv$1kn$1...@news.umbc.edu...
> I have an Accord 91 LX 4 cylinder 2.2 litre. I've always used 87 gas until
> recently, when I a friend recommended I use the highest grade - 93. His
> reasoning was that it would be easier on my engine, would improve
> performance and would last longer, which meant I'd save more in the long
> run.
>
> Is that true?
No, your car is designed to run on 87 octane . anything higher is a waste of
money
ed/ontario (`92 Accord)
Michael Fitzpatrick
> > until
> > recently, when I a friend recommended I use the highest grade - 93. His
> > reasoning was that it would be easier on my engine, would improve
> > performance and would last longer, which meant I'd save more in the long
> > run.
> >
> > Is that true?
>
> No, your car is designed to run on 87 octane . anything higher is a waste
> of money
Really? Wouldn't any car run better with a higher octane fuel? I thought
"supreme" is better than "regular" no matter what you drive. ???
Mark Gonzales
news:a8i0nf$nn5$1...@coranto.ucs.mun.ca...
Somewhere in my C&D or R&T archive, they said that running a higher octane
than what your car was designed for, over time, could damage some of the
internals. Something about the additives added to higher octane fuel not
combusting properly. I dunno. I'll see if I can find it. Anyone else here
this?
--
Mark
'99 Civic Si
NitroJunkie
to raise its flash point. Higher compression engines require this to prevent
ping or knock under hard acceleration. Higher octane gas is actually harder
to ignite. This prevents the gas from igniting under the higher pressure
before the spark plug fires.(which is what causes the knocking sound.) If
your car is designed to run on 87 then 93 is just a waste of money and may
not run as well. Save that extra money and use some of it on a bottle of
injector cleaner every 5 or 6 tanks.
"Michael Fitzpatrick" <r64...@morgan.ucs.mun.caDELETE> wrote in message
news:a8i0nf$nn5$1...@coranto.ucs.mun.ca...
Matthew Hunt
Michael Fitzpatrick <r64...@morgan.ucs.mun.caDELETE> wrote:
> Really? Wouldn't any car run better with a higher octane fuel? I thought
> "supreme" is better than "regular" no matter what you drive. ???
No, not at all. A higher octane number provides a single benefit: the
fuel will be more resistant to unwanted detonation ("knock" due to high
engine temperatures, compression ratios, forced induction, etc.). If
your engine would not knock(*) on regular fuel, then you get no benefit
from a higher octane fuel.
See, for example:
http://www.faqs.org/faqs/autos/gasoline-faq/part3/
(*) Actually, your engine might have a knock sensor to detect knocking,
in which case your engine management system will retard timing in order
to avoid knock, but at the expense of performance. So what I really mean
is "If your engine would not knock, and your computer would not retard
engine timing..." For this same reason, you should ignore all the people
here who say "If you're not knocking, it's fine" when people ask about
using a lower-than-specified octane fuel.
Dean
general public. The gas companies want you to make the faulty correlation
that "premium gas" is better for your car. It's not really better, it just
has higher octane, which is required by some engines (not your 4 cyl). An
analogy I can think of is like eating protein. Your body only needs a
certain amount of protein, once you exceed that amount, the rest just passes
through unabsorbed (eating 5 steaks will not make you any stronger than
eating 1 steak, the extra 4 are just wasted).
If you want "better gas", then you should look for ones that have cleaner
additives (Chevron gas supposedly has that).
"Majiin Will" <Ow...@Gerrard.Hyypia.Anfield> wrote in message
news:a8gnpv$1kn$1...@news.umbc.edu...
Curtis Newton
>> No, your car is designed to run on 87 octane . anything higher is a waste
>> of money
>
>
>Really? Wouldn't any car run better with a higher octane fuel? I thought
>"supreme" is better than "regular" no matter what you drive. ???
>
I believe that is called a good case of marketing.
Gordon McGrew
wrote:
>I have an Accord 91 LX 4 cylinder 2.2 litre. I've always used 87 gas until
>recently, when I a friend recommended I use the highest grade - 93. His
>reasoning was that it would be easier on my engine, would improve
>performance and would last longer, which meant I'd save more in the long
>run.
>
>Is that true?
No.
austinsho
"Timothy J. Lee" <remo...@sonic.net> wrote in message
news:a8fv2s$bj2$1...@newbolt.sonic.net...
>
> Car and Driver's November 2001 issue has an article about that subject.
> It is on its web site.
Perhaps, but fair warning....the site is almost unusuable due to Honda
popups.
George Macdonald
wrote:
>Higher octane is not better gas. It is basically the same gas with additives
>to raise its flash point.
No it's not done by extra additives. It's a different blend of refinery
streams with more high octane components and it has nothing to do with
flash point... if any one characteristic contributes, it's the spontaneous
combustion temperature which is slightly higher, thus preventing
pre-ignition and giving a smoother flame front when ignited.
> Higher compression engines require this to prevent
>ping or knock under hard acceleration. Higher octane gas is actually harder
>to ignite. This prevents the gas from igniting under the higher pressure
>before the spark plug fires.(which is what causes the knocking sound.) If
>your car is designed to run on 87 then 93 is just a waste of money and may
>not run as well. Save that extra money and use some of it on a bottle of
>injector cleaner every 5 or 6 tanks.
Rgds, George Macdonald
"Just because they're paranoid doesn't mean you're not psychotic" - Who, me??
George Macdonald
I've never heard of such a thing and it makes no sense... unless it's
referring to the old days of using TEL/TML to increase octane and even
there it's debatable whether there would be any long term ill-effects.
George Macdonald
If your engine's compression is not high enough to take advantage of the
higher octane it does no good at all. Going back in time a bit, the fuel
companies used to put better and more additives (anti-icing and detergents)
in premium fuel but that practice was stopped years ago.
There was also a time, way back in late 60s and early 70s, when the very
highest octane gasolines (101RON and the likes) could only be blended from
a very few components, which tended to be very high quality refinery
streams and which contained more stable hydrocarbons (no olefins), which
could be stored for longer before deteriorating. These very high octane
fuels were actually blended according to a recipe of selected streams and
they tended to burn very "cleanly". Then again the lead in TEL/TML used in
those days was often reponsible for much of the combustion chamber deposits
and fouling.
mac west
You could get an aftermarket chip that would advance your cars timing
and take advantage of higher octane.
George Macdonald
>You could get an aftermarket chip that would advance your cars timing
>and take advantage of higher octane.
If the compression ratio is not there - built in to the engine specs - it
will have minimal benefits in power and *could* be very dangerous for the
health of your engine.
mac west
would improve performance when I was doing it in the late 70,s today
the computer controled engines dont let you do anything with out a
performance chip.I have used them for years in all types of cars never
any trouble .I had dinan make a custom one for my 95v6 accords hunk of
shit tranny, it shifted so much better with the chip, no banging into
gears.
Rob M.
energy. :o)
Stephen Bigelow
Rob M. <Robert....@spamless.grc.nasa.gov> wrote in message
news:3CB1E74B...@spamless.grc.nasa.gov...
Dr. Planarian
Sometimes, as cars get longer in the tooth, deposits build up on the
inside of the cylinder head and the crowns of the pistons that
effectively increase the compression ratio. This results in
pre-ignition when using the regular fuel recommended for the engine
when it was new, and this problem can sometimes be solved by going to
a higher grade of gasoline.
This began happening to our old Toyota RAV4 when it hit about 90,000
miles. Upgrading to mid-grade (89-octane) gas improved the fuel
economy and driveability so significantly that it EASILY made up for
the additional cost.
David Brodbeck
"Dr. Planarian" <stopspam-flat...@cfl.rr.com> wrote in message
news:0t16bu42inqahd9k5...@4ax.com...
> Sometimes, as cars get longer in the tooth, deposits build up on the
> inside of the cylinder head and the crowns of the pistons that
> effectively increase the compression ratio. This results in
> pre-ignition when using the regular fuel recommended for the engine
> when it was new, and this problem can sometimes be solved by going to
> a higher grade of gasoline.
Happened to an '85 Ford Crown Victoria I used to have. When it was new it'd
run on 87 octane with no pinging unless it was towing something heavy.
After it got up in miles it required at least 89 octane midgrade, and ran
better on 91 octane premium. If you put 87 in it the pinging was loud
enough to scare horses and small children. ;)