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02-14-2006, 10:18 AM | #1 |
Drives: Toyota Yaris Join Date: Jan 2006
Location: Panama
Posts: 9
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What type of octane I should use???
Im a little confused about this, my car seller told me that I should use 95 octane gas, but the manual says I should use 91
What are the difference between 91 and 95??? My yaris got a 1.3 engine. |
02-14-2006, 11:22 AM | #2 |
Only Happy When it Rains
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I'd go with what the manual says.
The difference between octanes is how much pressure is required to ignite the fuel. The higher the rating the harder it is to ignite the fuel. |
02-15-2006, 09:11 AM | #3 |
I want JDM bumpers!
Drives: 5 Dr Yaris RS in Blazing Blue Join Date: Feb 2006
Location: Toronto
Posts: 419
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I thought the car (Yaris) can run on 87?
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02-15-2006, 10:34 AM | #4 | |
Only Happy When it Rains
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02-15-2006, 04:55 PM | #5 |
I want JDM bumpers!
Drives: 5 Dr Yaris RS in Blazing Blue Join Date: Feb 2006
Location: Toronto
Posts: 419
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oh, didn't saw the OP was from Panama...
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02-15-2006, 08:15 PM | #6 |
Drives: 05 YRS Silver Lining Metallic Join Date: Jan 2006
Location: Australia
Posts: 249
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the yaris is rated to run at 91 but can also accept higher octane. most people would claim a performance boost when using higher octane. while some would even claim better fuel efficiency with higher octane.
we use 91, as it is cheaper than 95, 98 or 100 octane. :) |
02-15-2006, 09:52 PM | #7 | |
I want JDM bumpers!
Drives: 5 Dr Yaris RS in Blazing Blue Join Date: Feb 2006
Location: Toronto
Posts: 419
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02-15-2006, 11:09 PM | #8 |
Drives: 06 3-dr auto RS Join Date: Jan 2006
Location: BC
Posts: 1,051
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Don't worry friend, the higher is the octane no., the harder it is for the fuel to burn.
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02-16-2006, 07:31 AM | #9 |
Drives: Toyota Yaris T SPORT Join Date: Feb 2006
Location: Budapest, Hungary
Posts: 110
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Hi guys! So the harder for the fuel to burn is not good in the long run? I have a TS model, I currently use 95 octane... What if I were to use 98 or 100 octane fuel, what would change? Would the car run better or would I feel a bit more power or torque, or is all this just BS?
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02-16-2006, 08:19 AM | #10 |
I want JDM bumpers!
Drives: 5 Dr Yaris RS in Blazing Blue Join Date: Feb 2006
Location: Toronto
Posts: 419
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Use what is recommanded in your user manual...
http://autorepair.about.com/od/engin...hoctanegas.htm |
02-16-2006, 08:19 PM | #11 | |
Drives: 06 3-dr auto RS Join Date: Jan 2006
Location: BC
Posts: 1,051
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03-04-2006, 11:53 PM | #12 | |
Drives: 06 3-dr auto RS Join Date: Jan 2006
Location: BC
Posts: 1,051
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I am not here to convince anyone to use higher octane fuel on old and not so well maintained cars(NB: more old than new cars are not too well maintained because of lack of warranty and regular attention or willingness of the owners to invest further money in them; lots of exceptions exist though). I do not think I ever can. Yet, I wish to point out that I have based my comments on the paragraph under "Should You Ever Switch to A Higher Octane Gasoline?" of the linked article. Obviously, the writer thinks it is o.k. to try using higher octane fuel first when knocking is detected on a car (on which the user's manual recommended grade of fuel is already in use). If the problem persists, then he reommends to have the car repaired or tuned up, which is utterly logical. Last edited by swng; 03-05-2006 at 01:05 PM. |
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02-16-2006, 10:18 AM | #13 | |
Only Happy When it Rains
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However there prolly would be a slight increase in tourque and fuel mileage with higher octane fuel. With fuel that is harder to burn, the spark timing can be set better, and the detonation can be more exact. This also means that the computer can use a more exact air/fuel ratio. The thing is if your vehicle is stock, it might not make a difference that you could actually feel in everyday driving. The only way you could tell is by using a dyno, and that gets really expensive. |
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08-22-2006, 07:58 PM | #14 | |
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02-24-2006, 01:27 PM | #15 | |
Drives: None yet Join Date: Feb 2006
Location: Farmington NY
Posts: 63
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02-25-2006, 10:11 AM | #16 | |
Drives: Toyota Yaris T SPORT Join Date: Feb 2006
Location: Budapest, Hungary
Posts: 110
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02-26-2006, 04:57 PM | #17 | |
Drives: None yet Join Date: Feb 2006
Location: Farmington NY
Posts: 63
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02-28-2006, 09:58 AM | #18 | |
Only Happy When it Rains
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I believe this because all manufacturers use 93 octane in the USA for all the testing. |
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