Engine & Internal Chat about beefing up your engine's insides here.

93 octane

  #1  
Old 08-19-2007, 04:30 PM
Thread Starter
Join Date: Jul 2007
Location:
Posts: 23
Default 93 octane

i usually use 87 octane fuel, but my friend says that 93 octane is better for your engine. i have a 95 accord ex with 175k on it. i was wondering if i switched to 93 octane if it would mess up my engine somehow or have any disadvantages. does anyone know anything about this?
 
  #2  
Old 08-19-2007, 04:45 PM
Velocifero's Avatar
Senior Member
Join Date: Nov 2006
Location: Arlington, VA
Posts: 636
Default RE: 93 octane

ORIGINAL: sdub102

i usually use 87 octane fuel, but my friend says that 93 octane is better for your engine. i have a 95 accord ex with 175k on it. i was wondering if i switched to 93 octane if it would mess up my engine somehow or have any disadvantages. does anyone know anything about this?
this has been covered many times, i would search to find your answer. but it can actually be worse. to run your car at optimum efficiency, only use what the owners manual states, which is regular fuel.
 
  #3  
Old 08-19-2007, 05:36 PM
Been Around A Long Time Member
Join Date: Jun 2006
Posts: 1,969
Default RE: 93 octane

That's how the gas companies get you at the pump....by preying on assumptions and insecurities.

Just get 87....the engine was designed that way.
 
  #4  
Old 08-19-2007, 07:21 PM
RTexasF's Avatar
Super Member
Join Date: Nov 2004
Location: Brownsville, TX 78521
Posts: 2,384
Default RE: 93 octane

Agreed. The V-6 will respond to higher octane but it is a waste of time and money for the 4 cylinder.
 
  #5  
Old 08-19-2007, 07:27 PM
Been Around A Long Time Member
Join Date: Nov 2006
Posts: 2,631
Default RE: 93 octane

why will the v6 respond and the i4 wont?

its a waste of $ unless its required.
 
  #6  
Old 08-20-2007, 10:21 PM
Join Date: Feb 2007
Location:
Posts: 234
Default RE: 93 octane

i have the same type of car with 175k on it as well. I use synthetic oil with no leaks and use premium fuel. Personally, I never got a chance to know what 89 octane performed in it. I put 93 in it since I got it. No smoke, No knocks, i'm happy with it.
 
  #7  
Old 08-21-2007, 12:31 AM
Almost A Senior Member
Join Date: Jul 2007
Location:
Posts: 318
Default RE: 93 octane

Wish I had 93 octane here in Cali. Highest we have is 91 octane.
 
  #8  
Old 08-21-2007, 06:38 AM
RTexasF's Avatar
Super Member
Join Date: Nov 2004
Location: Brownsville, TX 78521
Posts: 2,384
Default RE: 93 octane

ORIGINAL: smaglik

why will the v6 respond and the i4 wont?

its a waste of $ unless its required.
Technically I don't know. The engineer that designed the engine said an additional 10 HP was available from the V-6 using premium fuel.
 
  #9  
Old 08-21-2007, 09:40 AM
JimBlake's Avatar
Super Moderator
Join Date: May 2006
Location: Wisconsin
Posts: 17,456
Default RE: 93 octane

ORIGINAL: smaglik

why will the v6 respond and the i4 wont?
Without better information, I can take a reasonable guess..

The 4-cyl ECU has maps for spark timing & mixture over the operating envelope of the engine. The knock sensor can retard the spark from that map, but the ECU is probably not programmed to advance the spark beyond the map. So if the knock sensor is NOT hearing any knocking, it won't go hunting for the point of incipient knock.

Maybe the spark map for the V-6 is set up with enough advance sothat the ECU has to pull back the spark when it has 87 fuel?? I was not aware that Honda would have done this...
 
  #10  
Old 08-21-2007, 10:36 AM
RTexasF's Avatar
Super Member
Join Date: Nov 2004
Location: Brownsville, TX 78521
Posts: 2,384
Default RE: 93 octane

That sounds correct now that you mention it. I forget where I read the article but it was straight from the3.0l V-6 engine [email protected] Honda. Some intense googling may bring it up.
 

Thread Tools
Search this Thread
Quick Reply: 93 octane


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

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.