octane question - MustangForums.com

Notices
2005-2014 Mustangs Discussions on the latest S197 model Mustangs from Ford.

octane question

Reply

 
 
 
Old 04-13-2007, 12:05 PM
  #1  
mac10chap
4th Gear Member
Thread Starter
 
mac10chap's Avatar
 
Join Date: Feb 2005
Location: houston, tx
Posts: 1,660
Default octane question

maybe it was all in my head but here it goes...the other night i was on my way home and the stang wasat 10 miles to empty so had to stop for gas. it was about 1:30am so didnt have much selection as far as gas stations go. anyways, the station i stopped at was out of 93 octane so i had to put midgrade in (only $7.00 worth cause i was worried with my 93 octane tune)...15 mile drive home and parked her safely...the next morning, my car seemed to be more responsive and felt quicker than when i use the 93 octane.

has anybody else had this kind of experience???

since then, i have filled her up all the way with 93 octane and she seems to be running back to normal...how damaging could it be to put a tank of mid-grade gas in her next time to see if i am right or if it was all in my head???
mac10chap is offline  
Reply With Quote
Old 04-13-2007, 12:28 PM
  #2  
Daniel60
5th Gear Member
 
Daniel60's Avatar
 
Join Date: Dec 2004
Location: Small walk way by big walk way
Posts: 4,717
Default RE: octane question

I can say I have had some tanks of gas that worked better than others. I always run 93 octane. My problem is filling up and getting that tank ful that doesn't have enough octane. If mine worked better off of the 89 than I would run it unless it starting pinging. Sometimes I think there isn't much difference in the gas.
Daniel60 is offline  
Reply With Quote
Old 04-14-2007, 03:06 AM
  #3  
jrm1900
2nd Gear Member
 
Join Date: Feb 2007
Location:
Posts: 445
Default RE: octane question

Actually if I am not wrong octane is just a measure of the fuel resistance to detonation or knocking but has no effect on performance.
Race engines usually require high octane fuel because they run high compression ratio and/or high boost.
It is not advisable to run almost empty because the fuel pumps in our cars are submerged and the fuel helps keep the pump at lower temperatures thus making it last longer, additionally if you drive on twisty roads while almost empty it can lead to lean fuel mixtures that are no good for your engine....humm sorry I think this is not what you asked, anyway for what is worth every time I wash my car I feel it faster, and quiter (interior noise)
jrm1900 is offline  
Reply With Quote
Old 04-14-2007, 03:25 AM
  #4  
Rt1Rebel
3rd Gear Member
 
Join Date: May 2006
Location:
Posts: 803
Default RE: octane question

For the final time... Unless you have your car tuned for higher octane gas, it does NOTHING for your performance! The only thing higher octane does is prevent predetonation, which is critical in advanced timing or forced induction applications. If you have a stock tune, you are wasting your money and imagining things. Now just stop it already! sheesh.

And for the starter of the thread, who appears to have a higher octane tune, your tune might not be as aggressive as it could be, and/or the cooler weather has minimized the effect of the reduced octane, and/or the gas station actually filled the lower octane storage tank with higher octane fuel for inventory control purposes. In any case, the lower octane fuel will burn more easily, and as long as it doesn't predetonate, it's all good.
Rt1Rebel is offline  
Reply With Quote
Old 04-14-2007, 03:50 AM
  #5  
ratnacage
3rd Gear Member
 
Join Date: Feb 2006
Location:
Posts: 523
Default RE: octane question

Our cars have knock sensors, so even if you get bad gas (or have to temporarily run lower octane on a performance tune), the computer should keep you out of trouble.
ratnacage is offline  
Reply With Quote
 
 
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Dokilar
4.6L (1996-2004 Modular) Mustang
15
10-16-2015 09:13 PM
AMAlexLazarus
AmericanMuscle.com
3
10-02-2015 09:06 AM
AMAlexLazarus
AmericanMuscle.com
0
10-01-2015 11:29 AM
AMAlexLazarus
AmericanMuscle.com
0
10-01-2015 10:21 AM
treesloth
New Member Area
4
09-28-2015 08:03 AM


Thread Tools
Search this Thread
Quick Reply: octane question


Advertising
Featured Sponsors
Vendor Directory

Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.