Go Back   Honda-Tech > Honda and Acura Model-Specific Technical Forums > Acura Integra Type-R
Sign in using an external account
Register Forgot Password?
Search


Welcome to Honda-Tech!
Welcome to Honda-Tech.com.

You are currently viewing our forums as a guest, which gives you limited access to view most discussions and access our other features. By joining our community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join the Honda-Tech community today!


Reply
 
 
 
submit to reddit
 
Thread Tools Search this Thread
Old 01-30-2005, 01:11 PM   #1
Type-Rare#1248
Garage is empty, add now
 
Join Date: Dec 2001
Location: Vancouver, BC, Canada
Posts: 1,547
iTrader Rating: (0)
Default does gas lose its octane after storage?

Hey guys,
my car had been in storage for the past month or so and I just brought it back out this weekend. My car had been tuned to run on 94 octane gas. When I first brought it out, the car seemed a lot slower than before. Could it be because of the old gas in the car? I am currently running hondata, adjustable fuel pressure regulator...could anything have gone wrong with them during my storage?

another question is whether different temperatures would cause changes to a car's air fuel ratio? for example, if the air is colder outside, there would be more oxygen in your combustion chamber and therefore require more fuel to combust. If you keep the same amount of fuel, then the car would run lean. Is there anything wrong with my reasoning?

TIA Click the image to open in full size.
__________________
"It's not how hard you push along the way; it's having something in you to finish."
-Michael Jordan

Jun III Cams / Valve Springs / Retainers / Spoon Cam Gears
CTR Pistons
Jun Header / Renault Cat / T1R B-Pipe / Spoon N1 Exhaust
AJR Ported TB / Comptech Icebox / K&N Air filter
Hondata S100
T1R Lightweight Battery
Fidanza Flywheel / Exedy Clutch / Endless Na-M Break Pads / SS Brake-lines
15" Racing Hart CP-035 / Falken Azenis / Buddy Club Racing Spec Dampers
Type-Rare#1248 is offline   Reply With Quote
Old 01-30-2005, 01:14 PM   #2
1999all_motoR_teg
Honda-Tech Member
Garage is empty, add now
 
1999all_motoR_teg's Avatar
 
Join Date: Sep 2002
Location: all motor Toronto Canada, Canada
Posts: 970
iTrader Rating: (0)
Default Re: does gas lose its octane after storage? (Type-Rare#1248)

Yes gas does start to lose it's octane rating after about 2 weeks. When storing a car it's a good idea to go to any auto store and purchace a bottle of Sta-bil. It is a fuel stabilizer and will help keep the gas "fresh" for I believe the bottle says 12 months
__________________
http://www.defcon-racing.com
1999 K24/K20A DC2 roadrace car......driver/owner
2000 Honda Civic Hatch roadrace car.....co-driver
1999all_motoR_teg is offline   Reply With Quote
Old 01-30-2005, 03:20 PM   #3
nightrider
Honda-Tech Member
Garage is empty, add now
 
nightrider's Avatar
 
Join Date: Sep 2002
Location: Seattle, Wa, USA
Posts: 4,079
iTrader Rating: (0)
Default Re: does gas lose its octane after storage? (Type-Rare#1248)

go with the sta-bil as suggested. Click the image to open in full size.
__________________
92 Civic Si
'00 FBP ITR #1526 rockin' the JDM front-end. sold
nightrider is offline   Reply With Quote
Old 01-30-2005, 03:23 PM   #4
vtec.dc2
Honda-Tech Member
Garage is empty, add now
 
vtec.dc2's Avatar
 
Join Date: Aug 2002
Posts: 6,112
iTrader Rating: (0)
Default Re: does gas lose its octane after storage? (1999all_motoR_teg)

Quote:
Originally Posted by 1999all_motoR_teg
Yes gas does start to lose it's octane rating after about 2 weeks. When storing a car it's a good idea to go to any auto store and purchace a bottle of Sta-bil. It is a fuel stabilizer and will help keep the gas "fresh" for I believe the bottle says 12 months
2 weeks? really? how much of its rating does it loose within 2 weeks?
vtec.dc2 is offline   Reply With Quote
Old 01-30-2005, 03:24 PM   #5
Opie
Garage is empty, add now
 
Opie's Avatar
 
Join Date: Aug 2003
Location: Warning, gRand Return imminent,, NY, USA
Posts: 10,175
iTrader Rating: (0)
Send a message via AIM to Opie
Default

LOL

Opie, sits back and waits for formula Click the image to open in full size.
Opie is offline   Reply With Quote
Old 01-30-2005, 04:04 PM   #6
Combustion Contraption
Honda-Tech Member
Garage is empty, add now
 
Combustion Contraption's Avatar
 
Join Date: Jan 2003
Location: So Cal
Posts: 10,171
iTrader Rating: (0)
Send a message via AIM to Combustion Contraption
Default

No way its 2 weeks, i would say more like 2 months.
__________________
EARL LASKEY, YOU WILL BE MISSED
CCCylinderheads.com
Combustion Contraption is offline   Reply With Quote
Old 01-30-2005, 09:23 PM   #7
nemesis0104
Garage is empty, add now
 
nemesis0104's Avatar
 
Join Date: May 2004
Location: VTECing, mi, us
Posts: 684
iTrader Rating: (0)
Send a message via AIM to nemesis0104
Default Re: (LsVtec92Hatch)

Gasoline life varies on where it's stored, how much is stored, and weather conditions...Gasoline can last around 3-6 months..depending on those variables...so if you plan to store you car, just run your car down to a 1/4 tank...do a double dose of STABIL Fuel Stablizer and you won't have to worry about stale or gummy gas... Click the image to open in full size. Click the image to open in full size. double dose will allow the gas to stay fresh for 2 years.. Click the image to open in full size. Click the image to open in full size.

Since you car seems sluggish, just go fill it up and run it down to 1/2 tank and refill it again...it should dillute the old gas...hope that helps...
__________________
95' MILANO RED GSR - R.I.P. 4-29-04
01' NIGHTHAWK BLACK PEARL ITR
01' KAISER SILVER METALLIC K20A2 POWERED ITR....
MY KAAA [url="http://www.honda-tech.com/garage?cmd=viewcar&id=2276"]http://www.honda-tech.com/gara...=2276[/url]

nemesis0104 is offline   Reply With Quote
Old 01-31-2005, 02:21 AM   #8
1999all_motoR_teg
Honda-Tech Member
Garage is empty, add now
 
1999all_motoR_teg's Avatar
 
Join Date: Sep 2002
Location: all motor Toronto Canada, Canada
Posts: 970
iTrader Rating: (0)
Default Re: (opie)

Quote:
Originally Posted by opie
LOL

Opie, sits back and waits for formula Click the image to open in full size.

Well the formula is X molecules and Z temperature...LOL J/K Click the image to open in full size.

I've heard that it starts to loose it's rating after 2 weeks, guess I was wrong LOL

__________________
http://www.defcon-racing.com
1999 K24/K20A DC2 roadrace car......driver/owner
2000 Honda Civic Hatch roadrace car.....co-driver
1999all_motoR_teg is offline   Reply With Quote
Old 01-31-2005, 03:45 PM   #9
Type-Rare#1248
Garage is empty, add now
 
Join Date: Dec 2001
Location: Vancouver, BC, Canada
Posts: 1,547
iTrader Rating: (0)
Default Re: does gas lose its octane after storage? (Type-Rare#1248)

thx for the reply guys

is there anyone who could answer the second part of my question? Click the image to open in full size.
__________________
"It's not how hard you push along the way; it's having something in you to finish."
-Michael Jordan

Jun III Cams / Valve Springs / Retainers / Spoon Cam Gears
CTR Pistons
Jun Header / Renault Cat / T1R B-Pipe / Spoon N1 Exhaust
AJR Ported TB / Comptech Icebox / K&N Air filter
Hondata S100
T1R Lightweight Battery
Fidanza Flywheel / Exedy Clutch / Endless Na-M Break Pads / SS Brake-lines
15" Racing Hart CP-035 / Falken Azenis / Buddy Club Racing Spec Dampers
Type-Rare#1248 is offline   Reply With Quote
Old 01-31-2005, 04:24 PM   #10
visi0n
Honda-Tech Member
Garage is empty, add now
 
visi0n's Avatar
 
Join Date: Aug 2001
Posts: 678
iTrader Rating: (0)
Default

...octane is lost when light hits it for a large amount of time.

you will loose more octane storing your gas in a container than while in your gas tank.


as far as air fuel ratio goes...colder fuel = denser fuel so yes, you will run a tad more richer when colder, but colder fuel with colder air will almost equate out to equal the same air fuel ratio. stock computers have this compesation mapped out into its computer, so you should have around the same air fuel regardless of temp. maybe a difference of 0.1 or 0.2 air fuel when its colder outside or you have colder fuel.
__________________
-barry
visi0n is offline   Reply With Quote
Old 02-01-2005, 03:07 AM   #11
vtec.dc2
Honda-Tech Member
Garage is empty, add now
 
vtec.dc2's Avatar
 
Join Date: Aug 2002
Posts: 6,112
iTrader Rating: (0)
Default Re: (visi0n)

Quote:
Originally Posted by visi0n
as far as air fuel ratio goes...colder fuel = denser fuel so yes, you will run a tad more richer when colder, but colder fuel with colder air will almost equate out to equal the same air fuel ratio. stock computers have this compesation mapped out into its computer, so you should have around the same air fuel regardless of temp. maybe a difference of 0.1 or 0.2 air fuel when its colder outside or you have colder fuel.
its the other way around. where do you get your information? a/f will be more lean during winter time, i had mine tuned during winter so its safe all year long. change isn't dramatic so its drivable all year long. while rsx has this feature (using several maps based on temps), ours adjust for idle/startup, closed loop will will always adjust to 14.7 but wot will lean out during colder temps. for n/a application there isn't much to worry about unless you have higher flowing exhaust setup (header/cat/catback) and intake allowing more air and leaning out. mine dynoed in 14's a/f w/ stock ecu during winter (thats with i/h/e).
vtec.dc2 is offline   Reply With Quote
Old 02-01-2005, 07:24 AM   #12
Chris F
Senior Member
Garage is empty, add now
 
Chris F's Avatar
 
Join Date: Jun 2004
Location: Chicagoland, IL
Posts: 10,399
iTrader Rating: (0)
Send a message via AIM to Chris F
Default Re: (vtec.dc2)

Quote:
Originally Posted by visi0n
as far as air fuel ratio goes...colder fuel = denser fuel so yes, you will run a tad more richer when colder, but colder fuel with colder air will almost equate out to equal the same air fuel ratio.
Quote:
Originally Posted by vtec.dc2
its the other way around. where do you get your information? a/f will be more lean during winter time, i had mine tuned during winter so its safe all year long. change isn't dramatic so its drivable all year long. while rsx has this feature (using several maps based on temps), ours adjust for idle/startup, closed loop will will always adjust to 14.7 but wot will lean out during colder temps. for n/a application there isn't much to worry about unless you have higher flowing exhaust setup (header/cat/catback) and intake allowing more air and leaning out. mine dynoed in 14's a/f w/ stock ecu during winter (thats with i/h/e).
pwned by empirical gas laws.. PV=nRT for an ideal gas.
Charles' Law:
V/T = k .. so absolute temperature decrease means volume decreases (proportionally)

The difference between a hot (30 C) day and a cold (0 C) day is a 10% reduction in volume for the air, the density is higher by about 10% too. The gas will contract a LOT less than that (when's the last time you saw a 5 gallon container of gas shrink to 4.5 gallons in the winter? Me neither, but I've seen it happen to empty containers.
__________________
Chris Fries - #117 H1 Prelude - now with more VTEC (Thanks [url="http://kingmotorsports.com"]King![/url])
2007 and 2008 Midwest Honda Challenge H1 Champion
Go to Estrada Customs in Libertyville, IL! Great place for any body work!
Chris F is offline   Reply With Quote
Old 02-01-2005, 07:27 AM   #13
RGoose18
Honda-Tech Member
Garage is empty, add now
 
RGoose18's Avatar
 
Join Date: Sep 2003
Location: USA
Posts: 2,462
iTrader Rating: (1)
Default Re: (vtec.dc2)

Wow, a lot of ppl w/ a lot of damn OPINIONS and a ton of misinformation.
RGoose18 is offline   Reply With Quote
Old 02-01-2005, 07:47 AM   #14
vtec.dc2
Honda-Tech Member
Garage is empty, add now
 
vtec.dc2's Avatar
 
Join Date: Aug 2002
Posts: 6,112
iTrader Rating: (0)
Default Re: (Chris F)

Quote:
Originally Posted by Chris F
The difference between a hot (30 C) day and a cold (0 C) day is a 10% reduction in volume for the air, the density is higher by about 10% too.
i said nothing about gas. air is more dense during winter and will raise a/f ratio a bit.
vtec.dc2 is offline   Reply With Quote
Old 02-01-2005, 07:53 AM   #15
Chris F
Senior Member
Garage is empty, add now
 
Chris F's Avatar
 
Join Date: Jun 2004
Location: Chicagoland, IL
Posts: 10,399
iTrader Rating: (0)
Send a message via AIM to Chris F
Default Re: (vtec.dc2)

Quote:
Originally Posted by vtec.dc2
i said nothing about gas. air is more dense during winter and will raise a/f ratio a bit.
I was trying to agree with you!! I just added that bit about the gas because it "does" contract just a little bit. Click the image to open in full size.
__________________
Chris Fries - #117 H1 Prelude - now with more VTEC (Thanks [url="http://kingmotorsports.com"]King![/url])
2007 and 2008 Midwest Honda Challenge H1 Champion
Go to Estrada Customs in Libertyville, IL! Great place for any body work!
Chris F is offline   Reply With Quote
Old 02-01-2005, 08:30 AM   #16
Chris F
Senior Member
Garage is empty, add now
 
Chris F's Avatar
 
Join Date: Jun 2004
Location: Chicagoland, IL
Posts: 10,399
iTrader Rating: (0)
Send a message via AIM to Chris F
Default Re: does gas lose its octane after storage? (Type-Rare#1248)

If you're worried about octane, you can toss a gallon or two of Toluene/Xylene in your gas tank (about 118 octane) from a paint store. You can find it for $5-$6 a gallon if you look.
That is, if you're too impatient to burn off your current tank Click the image to open in full size.
http://www.honda-tech.com/zerothread?id=1032265
-Chris
__________________
Chris Fries - #117 H1 Prelude - now with more VTEC (Thanks [url="http://kingmotorsports.com"]King![/url])
2007 and 2008 Midwest Honda Challenge H1 Champion
Go to Estrada Customs in Libertyville, IL! Great place for any body work!
Chris F is offline   Reply With Quote
 
 
 
submit to reddit
Reply

Tags
bil, decrease, fuel, gal, gas, it, loose, lose, losing, octane, sta, stabil, storage, time, winter

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump



All times are GMT -8. The time now is 08:36 PM.



2008 Copyright, InternetBrands Inc.
Powered by vBulletin® Version 3.7.4
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.

Honda and the Honda marquee are registered trademarks of the American Honda Motor Company, Inc. Neither American Honda Motor Company nor its subsidiaries or affiliates shall bear any responsibility for Honda-Tech.com content, comments, or advertising. Honda-Tech.com is not affiliated with American Honda Motor Company in any way. American Honda Motor Company does not sponsor, support, or endorse Honda-Tech.com in any way. Copyright/trademark/sales mark infringements are not intended or implied.
Emails & Contact Details