what type of unleaded petrol could max the performance of f22b1 engine( compression ratio = 8.8) ? the recommended RON is 91 unleaded for australian model, but i thought 95RON premium unleaded might be better for the car, so i often use this type. however, somebody told me that 93RON can be used, but i think there is no such type except unleaded:91 premium 95 ultimate and BP's ultimate and shell's optimax which are 98RON

so im a bit confused whether to use unleaded:91 or premium 95 ?

 

most of the accord in the UNited states runs on 87 octane(we uses different ron rating than japan, not sure about aussie), just use the cheapest unleaded gas you can find.

for a stock motor(f22/f23) you are only wasting money for high octane gas, on some model you will even lose a couple hp by using premium(98-02 v6) is one example.

 

I dont think its worth spending any more money than you would normally on any 87 octane regular unleaded gasoline. I would, as the car gets older, check the gas filter for deposits.

 

87 octane unless you are at high altitude then it would be 85

 

actually im a fan who pursues max performance, but why people feel more powerful when they use higher octane fuel than the type recommended in the owner manual?

 

i usually use 87 but when i switched to 89 i see a difference at high speeds. especially on the freeway.

 

Higher octane means the spark plug can burn the fuel easier. More fuel burn, more power, more power = better accel and smoother ride and power. There is this additive(used to be lead) to make the gas burn more easily. but runs outs quicker...

My bro uses only 91 on his RSX and what a diff, so nice and smooth. rest of the cars use 87, and its ok for just city and regular driving.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by The-Kid &raquo;</TD></TR><TR><TD CLASS="quote">Higher octane means the spark plug can burn the fuel easier. </TD></TR></TABLE>

Common misconception... Higher octane means the fuel burns slower, which is why motors with a higher compression need it more. The higher the compression, the easier it is to have detonation, etc. Lower octane burns easier and quicker than higher octane.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by philadd &raquo;</TD></TR><TR><TD CLASS="quote">

Common misconception... Higher octane means the fuel burns slower, which is why motors with a higher compression need it more. The higher the compression, the easier it is to have detonation, etc. Lower octane burns easier and quicker than higher octane.</TD></TR></TABLE>

that is why people with nitrous run 01 or higher to not detonate.

 

O really WOW! you learn new things everday.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by The-Kid &raquo;</TD></TR><TR><TD CLASS="quote">O really WOW! you learn new things everday. </TD></TR></TABLE>

yes and it would be nice to put pull buttfudge out of your **** when you have no idea of what you talking about.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by gosu08 &raquo;</TD></TR><TR><TD CLASS="quote">

that is why people with nitrous run 01 or higher to not detonate.</TD></TR></TABLE>

n2o actually cools it down, but most people are not skill enough to map out a perfect tune.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by lxaccord51oxl &raquo;</TD></TR><TR><TD CLASS="quote">i usually use 87 but when i switched to 89 i see a difference at high speeds. especially on the freeway.</TD></TR></TABLE>

no, not really.

 

so what octane should i be running in my 99 V6?

 

O WOW! hmmmm... this forum really puts people down. Interesting.

 

87 octane is all that is required. J30a used in that car lacks knock sensor so it cannot adapt to higher octane fuels like the 03+ accord V6 can

 

if you are in just for chat then go to GDD or myspace, it's a technical forum and we ask you to respect that. If i hurt your e-feeling then here a e-napkin to clean the sands out of your uterus.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 96Civic_Coupe &raquo;</TD></TR><TR><TD CLASS="quote">so what octane should i be running in my 99 V6?</TD></TR></TABLE>

87-89 depends on your arear

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by YeuEmMaiMai &raquo;</TD></TR><TR><TD CLASS="quote">87 octane unless you are at high altitude then it would be 85</TD></TR></TABLE> So you are saying that a mile above sea leavel it is fine to use a lower octain? I always go with the mid grade because there is only 86,88,90, and 110 out hear. but I will try out the 86 and see how it runs.
also to you who got hurt, boo hoo. It is part of life, so make sure you know eaxactly what you are talking about by doing research. either that or like me just admit your a dumbass, and are hear to learn.

 

Has it been proven? For 93 Octane that it loses HP on the 98-02 v6? I've been using 93 eversince I had the car (3+ yrs now).

 

You may not notice a loss of power, but you would certainly get better mileage on 87 octane. I've noticed a difference of about 2 mpg on both the 4-cyl and V6 engines (6th gen).

 

But, I thought it was bad, to just switch the gas from one to another?

 

Why would it be?

It's only bad to switch to a lower grade of fuel than what the manufacturer recommends.

 

i just found this (i think this is european rating, for US, the no. should minus about 4-5):


compression ratio RON rating
7.5—8.0 90/93
8.0—8.5 93/95
8.5—9.0 95/97
9.0—9.5 97/98
9.5—10.0 98

Modified by HONDAVTIS at 2:57 AM 12/27/2006


Modified by HONDAVTIS at 2:57 AM 12/27/2006

 

car and driver noticed a loss of 4 HP on premium fuel (car and driver Nov 01 issue) This translates into a loss of as much as 15ftlbs of torque......

 

higher altitude = less air = less fuel required due to lower effective compression ration. Even though CR is 9.X to one at higher altitudes it might be 8.X to one and therefore you can use lower octane fuel. This would not apply for engines that are forced induction since the compressor still compresses the air before it enters the cylander......

 

good to know, and a saver at the pumps.

 

the recommended gas for the same 96 accord f22b1 engine varies differently in australia and hongkong???????

i found this interesting thing in the owner's manual:


F22b1 premium unleaded 97RON for HK model
unleaded 91RON for australian model

based on what i know, the grade rating in these two areas should be the same. does anyone know how would this make any sense???????