Octane gas

hey everyone
if i put octane gas in my honda accord will i get any difference in the perfromace? will it help the car run better?

I assume you mean higher octane than regular 87?
If so, the answer is no, you won't get better performance.  Honda Accords were made to perform optimally on 87 octane gas.  Unless you do some engine mods that require premium (i.e. turbo), higher octane gas will not do anything.  If anything, it will actually hurt your gas mileage and may cause engine damage in the long run.

i only put it onece so should i be woried about it?

oh and i always put premium gas...just thought i would try a little higher to see if it made a difference but i guess not

I wouldn't worry about it, but I wouldn't waste my money on premium anymore

oh okay..yeah i know..but i found out that if putting premium in the 05 V-6 accords yours spose to get more HP according to honda  engineers if putting premium in the 05 V-6 accords you are spose to get 250 hp rater then 240 i dont know i looked it up but not sure i dont have the webpage right now but i will post it later on and u can read it yourself

Yeah if you could find that site and link it up it would be great.  Believe it or not, I do actually like being proven wrong on some topics

The designer of Honda's 3.0l V-6 is the one that made that statement in an interview. He said that 10 more horsepower was available when using 93 octane or better. I've posted that damned article a hundred times for those thinking I was blowing smoke and now I can't find it. With fuel prices today it wouldn't be worth it to me to cough up 20 cents or more a gallon for 10 horses at the flywheel.
 
This isn't the one I was looking for but:
 
The J30 displaces 3.0 L and is a SOHC VTEC design. Output for the J30A1 was 200 hp (149 kW) and 195 ft·lbf (264 N·m) of torque. The J30A4 pushed output to 240 hp (179 kW) and 212 ft·lbf (287 N·m) using a three-way VTEC system, higher (10:1) compression ratio, and a novel exhaust manifold cast as one piece with the cylinder head. This version was on the Ward's 10 Best Engines list for 2003 and 2004. Honda provided an undocumented, but verified 10 hp boost when owners use 93 octane fuel, resulting in 250hp. The IMA hybrid version was on the list for 2005. In 2006 to mark the 30th anniversary of the Accord, Honda created the J30A5, which boosted output to 244 hp (SAE Net 08/04) and 211 ft·lbf (SAE Net 08/04) of torque. According to Honda, horsepower gains were achieved with extensive improvements to the airflow of the intake and exhaust systems.

J series rule!!!!!!!!!!!!!

I've noticed a bit of a performance increase when i used the highest octane after months of 87...

however it's very very VERY important to notate that octate has nothing to do with performance, but rather the compression and knocking characteristics of your 'tanes (iso-octane and heptane) mixtures.. iso-octane is rated at or near 100% octane and is mixed with heptane (a 0% octane ratio) to make your octanes you see in gas stations (87, 91, 93, etc)

deflagration *should* be consistent in theory, but i personally believe that if your engine is knocking less then it should probably perform a tad better... which is why some people see this performance increase, and others don't.

i agree that 10hp isn't worth the ongoing cost.. if i could do something to the car to make the permanent for one cost, that'd be more beneficial.

I learn something new every day!  Thanks RTexasF!

here is the link that said it.....http://everything2.com/index.pl?node_id=1371221
i think i am gonna keep using the premium cuz i do feel difference and after putting cold air intake in the car
it's a really big difference

oh and i do think it's worth it :-)

dayum, now that's what you call an engine bay! haha and i'm not talking about the SF bay, that's more like gulf of mexico! haha

oh wow nice i dont got the money to do all that but soon i will :-)

Lol it has a J32A1 looks nice.i want that grille he has

Lower octane burns quicker ----> more power.  Higher octane fuel is meant to prevent knock (pre-ignition) on higher compression engines.  10:1 CR should use mainly plus fuel IMO (91 octane).  The older J30A1 was proven to get better performance from 87 octane than 93, but it has a CR of 9.4:1.

 
Don't agree.  The higher the octane the more efficiently the engine will utilize fuel GIVEN a matching compression ratio.  9.7/1 won't get anything or very little out of 93 octane.  10.5/1 will efficently utilize the octane but still isn't worth the premium price.  The question is whether the incremental cost is worth the performance and mpg.  Takes 1.4 gal of E85 to equal the mpg of 1 gallon of gasoline.  However if the compression ratio is boosted to, say, 12/1 then the differential shrinks. The V6 is 10/1 and will efficiently use higher octane fuel.  My rule of thumb is that I will use 91 octane provided it is within 5 percent of 87 octane.  Better performance, better mpg.  Close enough to justify. Wife's 05 Sable is a Duratec 30 with 10.5/1 compression ratio.  Ford says 87 octane BUT the engine, aluminum designed by Porsche, will efficiently utilize 91 octane with better performance. She doesn't care so 87 is the fuel.  It takes a tank for the PCM tto adjust the timing map to higher octane fuel.

Then don't agree.  For other readers, please do your own research before buying into any of the schemes.  Most vehicles will not adjust to a type of gasoline.  As far as I know, only flex-fuel vehicles do this to make it possible for them to run so much alcohol.

Im gonna sell the Accord for an Insight! I cant even drive my Accord these days cause of gas prices...(and Im turbo too...)

yeah falk is right; the higher compression the higher the octane, which means the higher concentrations of heptane.

heptane's boiling level (or in our case combustion level) is about 35% less than that of iso-octanes found in our fuel; hence you get worse gas mileage... it's not because your car uses more or anything else someone might state.

i haven't researched too much on the flex fuel; but i'm not buying into that yet anyway...


now... does anyone have any arguments over the "brand" of gas you buy? ie, Chevron vs RaceTrack vs 7-11, etc?

I mostly buy from RaceTrack, seems to be a stable fuel source at decent prices.

I have always liked the way Exxon made my car run

^^^  My grandfather owned an Esso station and gave my mother and her sisters Texaco cards when the Esso would have been free to them.  Food for thought.

Gasoline sources are local or regional.  Brand XYZ stations in California get gas from one refinery or terminal, while the same brand stations in Ohio get it from somewhere else.
 
Blending is different around the country, especially in winter.  There's a bunch of different winter-blend gasolines around, and probably different blends in summer too.
 
My personal guess is the really big names like Shell, Mobil, BP are probably pretty consistant across the country.  Smaller brands may be OK here but not OK there.  Are you confused yet?
 
And anti-knock requirements ('octane') are more complicated than just compression ratio.