Go Premium for a chance to win a PS4. Enter to Win

x
?
Solved

what to expect with octane 93

Posted on 2011-02-25
9
Medium Priority
?
425 Views
Last Modified: 2012-05-11
i accidentally put the high grade gas, while regularly put regular without thinking.. can i expect the engine to perform better? it is a dodge caravan.
0
Comment
Question by:anushahanna
9 Comments
 
LVL 12

Accepted Solution

by:
Amick earned 400 total points
ID: 34986106
The Caravan may perform better if the computer adjusts the performance parameters to take advantage of the extra octane, but it is doubtful such programming exists in this vehicle.  There is generally no advantage to higher-octane fuel than an engine is designed to use.
0
 
LVL 17
ID: 34986250
There can be a disadvantage. The engine may suffer from pre-ignition (or pinking), as the difference in fuel needs to be offset by a change in the timing. It feels a little like a misfire and you can hear a sort of 'chattering' from the engine. Continuous pre-ignition can damage the bearings etc in the engine as you have pistons still compressing while the gas is exploding.
I wouldn't worry too much though, just add some normal fuel when you can to gradually dilute the high octane back to the normal level.
0
 
LVL 34

Assisted Solution

by:Michael-Best
Michael-Best earned 400 total points
ID: 34989163
"can i expect the engine to perform better?"
No and no disadvantage:
(except for the price of the gas)

RobinD: The engine may suffer from pre-ignition (or pinking)  
No way:

A higher octane rating means the fuel is less likely to cause your engine to knock or ping. Knock, also known as detonation, occurs when part of the fuel-air mixture in one or more of your car's cylinders ignites spontaneously due to compression, independent of the combustion initiated by the spark plug. (The ideal gas law tells us that a gas heats up when compressed.) Instead of a controlled burn, you get what amounts to an explosion--not a good thing for your engine. To avoid this, high-octane gas is formulated to burn slower than regular, making it less likely to ignite without benefit of spark.

Car engines nowadays contain knock sensors that detect detonation and automatically retard the spark to compensate.
 
An additional amount of( high octane gas ) less than half of what was in your tank (of regular gas ) will have no affect, so just top it up with the correct gas as soon as you can.

Further reading:
http://www.cartalk.com/content/features/premium/questions.html
0
Hire Technology Freelancers with Gigs

Work with freelancers specializing in everything from database administration to programming, who have proven themselves as experts in their field. Hire the best, collaborate easily, pay securely, and get projects done right.

 
LVL 17
ID: 34989513
Apologies, I had that the wrong way round. Thanks for pointing that out Michael.
0
 
LVL 34

Expert Comment

by:Michael-Best
ID: 34989586
RobinD:
Apologies accepted, we all appreciate your iinput.
0
 
LVL 26

Assisted Solution

by:David Brugge
David Brugge earned 400 total points
ID: 35004105
Just to dispel a persistent misunderstanding caused by gasoline advertising--higher octane gas does not have more power.

It burns at the same rate and gives the same energy as the same gas with a lower octane rating.

What the octane does, as Michael has explained, is keep the gas from igniting too early in high compression engines.

A high compression engine, running gas with too low of an octane level, will indeed fire prematurely, robbing the engine of power. Switching to a gas with more octane will let the engine run properly. To an advertising man, this means more power. However that's like saying a clean air filter adds more power to your engine. It doesn't add more power, it's just that a dirty filter takes away power and a clean one puts it back.
0
 
LVL 17

Assisted Solution

by:Tiras25
Tiras25 earned 400 total points
ID: 35022593
No, it won't run any differently.

However,  MPG may drop.
0
 
LVL 16

Assisted Solution

by:dhsindy
dhsindy earned 400 total points
ID: 35038446
Just don't put diesel in it by mistake.

I was using 93 octane in my Ford Ranger when I first got it until, my son the trained/certified mechanic told me, "Your wasting your money."  That is one of the few times I listened to him and I went back to regular.
0
 
LVL 6

Author Comment

by:anushahanna
ID: 35041500
quiet information - i will be careful next time. thank you.
0

Featured Post

Free Tool: ZipGrep

ZipGrep is a utility that can list and search zip (.war, .ear, .jar, etc) archives for text patterns, without the need to extract the archive's contents.

One of a set of tools we're offering as a way to say thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

EE introduced a new rating method known as Level, which displays in your avatar as LVL. The new Level is a numeric ranking that is based on your Points. This article discusses the rationale behind the new method and provides the mathematical formula…
Gift cards are not a new concept - it's been around for a very long time.  Undoubtedly, over the past you have received such a card or purchased one for a friend or relative.  Are you aware that you've been feeding the machine?  If not, read on :)
Notifications on Experts Exchange help you keep track of your activity and updates in one place. Watch this video to learn how to use them on the site to quickly access the content that matters to you.
Saved searches can save you time by quickly referencing commonly searched terms on any topic. Whether you are looking for questions you can answer or hoping to learn about a specific issue, a saved search can help you get the most out of your time o…
Suggested Courses

885 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question