Octane 87 89 91 93 95 ???????
I feed my Fit with 87 octane unleaded gasoline at any brand name gas station whichever is the cheapest.
It runs and feels the same so far since the first day from the dealership.
It runs and feels the same so far since the first day from the dealership.
Last edited by ChrisN; May 10, 2008 at 10:45 PM.
Member
Joined: Jun 2006
Posts: 1,104
From: Chattanooga
Thanks for the link. I've read one of those before. However, do they or you have any concrete evident or any solid proof that by not using Top Tier Gasoline can lead to engine build-up since most if not all engines will get build-up, eventually.
I think the gas company is doing a great job in manipulating consumers to pay for higher gas price.
I'm not paranoid about engine build-up, and that is all my intention to say.
I think the gas company is doing a great job in manipulating consumers to pay for higher gas price.
I'm not paranoid about engine build-up, and that is all my intention to say.
your car is suppose to run on 87 octain. Runnin with 91 or higher overtime will mess with your )2 sensors or other things causing problems, or having to replace them. And there is no benefit to runnning a higher octain if your car is not tuned to run on a higher octain. Those cars that do need 91+ have advanced timing, higher compression, combustion etc.
Last edited by dank24; Jul 31, 2007 at 11:06 PM.
Member
Joined: Jul 2007
Posts: 594
From: Seymour, CT
The fit is made to run on a minimum octane rating of 87, with that said putting in anything greater than that would only be beneficial. I've driven in europe plenty of times, the minimum octane rating there in many places is 95 with very small engines(1.0 - 1.8ltr) and they run great. I doubt putting in 93 would be a problem, but for those of you who are speculative maybe 91 or 89 would be ok.
Member
Joined: Jul 2006
Posts: 84
From: FL, US
that the octane is also rated differently in different countries. but regardless its not the engineers decision to advertise that the fit requires 87.... keep in mind this is marketed as an economy car here, even if it does require 93, would honda dare to say it does? i think its more about marketing, also the manual statess "87 or above"
Last edited by nsx280ps; Aug 1, 2007 at 10:30 PM.
Push My Button
Joined: May 2007
Posts: 4,997
From: Calgary, Alberta
I hate telling people what they should do.... but you should be using 87 as Honda reccomends, anything else is basically throwing your money away. I think people are missing the point of higher octane gas, higher octane does not mean it is better.... seriously! I am not BS'ing you!!
It is intended for higher compression engines as an additive to retard the detonation time.... not only that it has LESS energy in it meaning you will probably get worse mileage using it. Sorry guys, but this is like somebody trying to buy cuban cigars for your buddy when all he asked for was a pack of smokes (lol, Look at me bust out the metaphors!) Your engines are designed to take full advantage of regular fuel to save you money by getting better mileage.
An exception to the rule is at higher altitudes of more than 1000 feet above sea level; you should be using slightly higher octane levels to compensate. I generally slip a bit of premium gas to mix into the tank before I hit the higher altitude mountain roads. This is also a reccomended practice.
Also if you have any kind of FI system... your compression goes up and so should your gas octane leves. Kancerr nailed that one.
It is intended for higher compression engines as an additive to retard the detonation time.... not only that it has LESS energy in it meaning you will probably get worse mileage using it. Sorry guys, but this is like somebody trying to buy cuban cigars for your buddy when all he asked for was a pack of smokes (lol, Look at me bust out the metaphors!) Your engines are designed to take full advantage of regular fuel to save you money by getting better mileage.
An exception to the rule is at higher altitudes of more than 1000 feet above sea level; you should be using slightly higher octane levels to compensate. I generally slip a bit of premium gas to mix into the tank before I hit the higher altitude mountain roads. This is also a reccomended practice.
Also if you have any kind of FI system... your compression goes up and so should your gas octane leves. Kancerr nailed that one.
Last edited by Sugarphreak; Oct 1, 2007 at 07:46 PM.
Member
Joined: Jun 2007
Posts: 524
From: Dallas, TX
An exception to the rule is at higher altitudes of more than 1000 feet above sea level; you should be using slightly higher octane levels to compensate. I generally slip a bit of premium gas to mix into the tank before I hit the higher altitude mountain roads. This is also a reccomended practice.
Push My Button
Joined: May 2007
Posts: 4,997
From: Calgary, Alberta
This is incorrect. Octane requirements are lower at high altitude. In fact, premium grade gas in places like Denver will have an octane rating 2-3 points lower than places at lower elevation. Higher elevation means lower air pressure multiplied by the compression ratio equals lower cylinder pressures and thus reduced octane requirements. Higher elevation also also corresponds to lower temperature which further reduces likehood of predetonation.
Member
Joined: Oct 2007
Posts: 145
From: Orangevale, CA
In agreement with what everyone else is saying, I have to say that this is probably wrong. A car's fuel mapping has to be able to take into account higher octane, but the fit's fuel mapping is only designed for 87. Any more, and you truly are wasting money.
A good example of this in real life would be from my previous car, stage 2 05 WRX. It takes 91 octane, and if you put in any more, nothing really changes. Later on, I got a chip with which you can re-flash the ECU to change the fuel maps. One time I got about a 3/4 tank of 100 octane gas, and i changed the fuel map to 93 octane to take advantage of the boost, and yes it did change things quite drastically, but without that fuel map change, it didn't really do jack.
As for the comment on keeping the engine cleaner, I disagree with that as well. I have an engineer friend who works at Chevron that has taught me what I know about this subject. Some gasoline's come with detergent additives, such as Chevron's "Techron". Techron is available in all of their octane ratings, thus all of the octane ratings "clean" just as well as any other. The reason gasses like Arco are so cheap is because they don't use additives or they don't use as much, I forgot.
Some will argue that Techron is marketing BS, but I believe my friend that works at Chevron..she's a chemical engineer, so I trust her word.
Hope this sheds some light on the issue.
Tre
A good example of this in real life would be from my previous car, stage 2 05 WRX. It takes 91 octane, and if you put in any more, nothing really changes. Later on, I got a chip with which you can re-flash the ECU to change the fuel maps. One time I got about a 3/4 tank of 100 octane gas, and i changed the fuel map to 93 octane to take advantage of the boost, and yes it did change things quite drastically, but without that fuel map change, it didn't really do jack.
As for the comment on keeping the engine cleaner, I disagree with that as well. I have an engineer friend who works at Chevron that has taught me what I know about this subject. Some gasoline's come with detergent additives, such as Chevron's "Techron". Techron is available in all of their octane ratings, thus all of the octane ratings "clean" just as well as any other. The reason gasses like Arco are so cheap is because they don't use additives or they don't use as much, I forgot.
Some will argue that Techron is marketing BS, but I believe my friend that works at Chevron..she's a chemical engineer, so I trust her word.
Hope this sheds some light on the issue.
Tre
..some people buy aftermarket coils that are advertised as 50-100Kv, "more spark, more power, blah blah" ...etc, however, it is only going to output the 12kv required to fire that spark plug, it is the same with the octane rating of fuel
(i understand there are certain exceptions, where more ignition power is required for some high performance, etc applications)
however, what chevron does is add 1 drop of cleaner called "tecron" to their high octane gas, tempting you to pay for it, when in fact any improvement you would feel would be purely placebo effect, or perhaps that you have unclogged the injectors, but i would doubt it,
on that note, i am an ase master tech, and i would recommend a product from the company BG called 44k, which is a fuel additive that cleans injectors, intake valved and combustion chambers, really good stuff, you can get it from the dealer.
Honda Fit Forums Moderator
Joined: Mar 2007
Posts: 287
From: Elkins Park, PA
I used 87 octane for the first 6 months, and only got about 24mpg, so I decided to try 89. The second tank got me almost 27, but the third was about 23 (same drive)! I put in 93 last week, but smashed my car before I got an mpg reading, though it was looking like it was going to be a very good tank!
I used 87 octane for the first 6 months, and only got about 24mpg, so I decided to try 89. The second tank got me almost 27, but the third was about 23 (same drive)! I put in 93 last week, but smashed my car before I got an mpg reading, though it was looking like it was going to be a very good tank!
Get a 2009 Fit Sport
Your good or not mpg would need to be repeatable so that any changes would be due to the gas octane you used, not due to how your drove on that specific tank of gas or the conditions of traffic during that time.
Member
Joined: Jun 2007
Posts: 130
From: Unknown
I recommend the higher octane... I use 91 and I feel and see the big different against 87... It gives you more milages and power. Why don't you guys try it with your self.
As you can see in yours owner's manual... on page "132"
Its really clear that using lower octane can lead to engine damage... So it means the higher the better. Just my 2 cents. Remember Honda made these owner's manual so I listen to the experts.
As you can see in yours owner's manual... on page "132"
Its really clear that using lower octane can lead to engine damage... So it means the higher the better. Just my 2 cents. Remember Honda made these owner's manual so I listen to the experts.
