93 Octane my car loves
01-04-2005
#32
OMNES AD UNUM
iTrader: (3)
Join Date: Sep 2003
Location: NOR-CAL
Posts: 5,855
Likes: 0
Received 0 Likes
on
0 Posts
Rep Power: 309 
would it be ok to switch over from 87 to 89 everytime i fill up? example: monday-87 reg, its thurs and tank is low.i then fill up with 89. then back to 87 etc etc.
how about for the d17's that have full bolt ons, would they need a little better gasoline for their 'performance' mods?
how about for the d17's that have full bolt ons, would they need a little better gasoline for their 'performance' mods?
01-04-2005
#33
Registered!!
iTrader: (18)
Join Date: May 2002
Location: San Francisco/Berkeley, California, US
Posts: 2,492
Likes: 0
Received 0 Likes
on
0 Posts
Rep Power: 0 i think the only time u need to upgrade octane is when you touch things that relates to the internals, such as FI (turbo or sc) or internal upgrades (pisons, cam, etc). Bolt-ons doesn't really do much other than to have "better" flow.
However I put nothing but 91 Chevlon(sp?) in my stock civic.
However I put nothing but 91 Chevlon(sp?) in my stock civic.
01-04-2005
#34
O RLY
Hey! Look At Me!! I'm a Supporting Member!!
iTrader: (1)
Join Date: Dec 2001
Location: Milwaukee, Wisconsin, US
Age: 44
Posts: 10,031
Likes: 0
Received 0 Likes
on
0 Posts
Rep Power: 375 
there's no need to put in a higher octane than what the minimum required is for your car.
higher octane gas means it is more resistant to detonation, which you need on a car with higher compression. turbo'd cars often use higher octane gas, due to the fact that the turbo increases the heat and with the compression increases the chance of early detonation, especially when you crank up the boost.
higher octane gas means it is more resistant to detonation, which you need on a car with higher compression. turbo'd cars often use higher octane gas, due to the fact that the turbo increases the heat and with the compression increases the chance of early detonation, especially when you crank up the boost.
01-04-2005
#35
Registered!!
iTrader: (3)
Join Date: Aug 2002
Posts: 863
Likes: 0
Received 0 Likes
on
0 Posts
Rep Power: 0 I'm sorry gearbox, im not cracking on you or anything man. Dude you need nitrous, turbo, swap, something. Because everything you do to your car you say it reduces horsepower. I'm sorry man I just think its funny, that all of your posts about performance say the same thing.
Alright, for me i've always been able to tell a difference when putting 93 in my tank compared to 87. I always use chevron and one time, I went to the a chevron and put in 93 supposedly just a little ways down the road I could immediately tell that they didnt fill the supreme tank w/ 93 they filled it with something less. I could feel it in my performance so I completely ran that tank out, went to a different chevron filled up w/ 93 and felt the performance difference come back. You guys can crack on me or w/e im just saying thats my experience with it.
Alright, for me i've always been able to tell a difference when putting 93 in my tank compared to 87. I always use chevron and one time, I went to the a chevron and put in 93 supposedly just a little ways down the road I could immediately tell that they didnt fill the supreme tank w/ 93 they filled it with something less. I could feel it in my performance so I completely ran that tank out, went to a different chevron filled up w/ 93 and felt the performance difference come back. You guys can crack on me or w/e im just saying thats my experience with it.
01-04-2005
#36
snooty patooty partier
iTrader: (10)
Join Date: Jun 2004
Location: 925, CA
Age: 39
Posts: 3,448
Likes: 0
Received 0 Likes
on
0 Posts
Rep Power: 277
Originally Posted by realitycheck
I always use chevron and one time, I went to the a chevron and put in 93 supposedly just a little ways down the road I could immediately tell that they didnt fill the supreme tank w/ 93 they filled it with something less. I could feel it in my performance so I completely ran that tank out, went to a different chevron filled up w/ 93 and felt the performance difference come back. You guys can crack on me or w/e im just saying thats my experience with it.
01-04-2005
#37
Registered!!
iTrader: (3)
Join Date: Aug 2002
Posts: 863
Likes: 0
Received 0 Likes
on
0 Posts
Rep Power: 0 Well I pumped in 93 octane, but the people at chevron that fill the big massive underground tanks didnt put 93 in there. Sometimes if they dont have in there truck or w/e they will put in whatever they have.
01-04-2005
#38
Yes, it's an Acura EL
iTrader: (23)
Join Date: Dec 2002
Location: 416-905, Ontario, Canada
Age: 46
Posts: 8,248
Likes: 0
Received 0 Likes
on
0 Posts
Rep Power: 344 I was reading a thread similar to this on some other board last week. Went to pick up my gf and decided to grab me some 87 at Sunoco. Given that I always fill up with 94 for no reason other than to feel like a hip hop superstar and blow money, I thought I would examine the change. Got to the station, and there was a sign taped to each 87 nozzle, saying "Out of 87, please fill up with 94 at the same price". I said "gawd damn, no way I can beat 67 cents a litre for 94". Ha ha, so back to 94 I went. Been running it in my car for almost 2.5 years, no problems but no gains. Again, I'm not using the gas to make my car run faster/longer/cleaner/shinier/better-smelling. I just wanna feel like a big man shelling bucks, and I figure considering I save an average of $300 a month on install costs doing things myself, this is one of those useless treats I can give myself, like that last shot of liquor at the bar when you're already wasted, or an extra fortune cookie at the chinese takeout place. And now back to shopping for parts.....
01-04-2005
#39
Nothing works better than a Chris except a Honda.
Join Date: May 2002
Location: Baltimore, MD
Age: 38
Posts: 5,346
Likes: 0
Received 0 Likes
on
0 Posts
Rep Power: 322 I'm not really feeling any performance gains unless I'm running high up in the gears with the VTEC. I drive an auto but I do notice the shifts are smoother. I use it all the time. When I swtich to a lower grade of gas the car doesn't feel the same...
01-04-2005
#40
Registered!!
iTrader: (1)
Join Date: Apr 2004
Location: ft lauderale
Age: 38
Posts: 706
Likes: 0
Received 0 Likes
on
0 Posts
Rep Power: 0 yes 93 wont do anything for the car performance wise
also ive heard that if you live in sea level you must use lower octane and on warmer better lower octane performs better
ive tried using all three types of gas and the lowest one performs betteer and last a little longer
unless ur car says permium unleaded only u dont need to use it
also ive heard that if you live in sea level you must use lower octane and on warmer better lower octane performs better
ive tried using all three types of gas and the lowest one performs betteer and last a little longer
unless ur car says permium unleaded only u dont need to use it
01-04-2005
#41
Registered!!
iTrader: (7)
Join Date: Oct 2004
Location: New Jersey
Age: 41
Posts: 9,070
Likes: 0
Received 0 Likes
on
0 Posts
Rep Power: 336 well i use 94 and if i cant get that i get 93. and i can tell a differance. but now i cant use anything less then 93 so it doesnt matter i alwayz used 93 or better from the start.
01-04-2005
#42
just a troll who likes to laugh at YOU.
Join Date: Sep 2004
Location: lafayette, IN
Age: 51
Posts: 282
Likes: 0
Received 0 Likes
on
0 Posts
Rep Power: 242
Originally Posted by jttegx
would it be ok to switch over from 87 to 89 everytime i fill up? example: monday-87 reg, its thurs and tank is low.i then fill up with 89. then back to 87 etc etc.
and yes, i have worked at a refinery and have a chemical engineering degree.
01-04-2005
#43
Registered!!
iTrader: (1)
Join Date: Oct 2002
Location: 4o8, California
Posts: 2,150
Likes: 0
Received 1 Like
on
1 Post
Rep Power: 286 I heard that higher octane can cuase more deposits to build up in your cat converter since it has more oils in it. Over time, these deposits will eventually cook your cat converter up. Not sure if this only applies to old school cat converters though..
01-04-2005
#44
Autocross Junky
Hey! Look At Me!! I'm a Supporting Member!!
Join Date: Oct 2002
Location: Las Vegas, Nevada, US
Age: 45
Posts: 7,211
Likes: 0
Received 0 Likes
on
0 Posts
Rep Power: 356 This is funny.... So you guys can Feel a difference Eh? with your Perfectly acurate "Butt Dyno"? Right.......
Did you know that Higer octane gas is acutally Harder to burn? As previously stated, the Octane rating is the Ratio of Octane to Heptane in the fuel. of these two parts of the gas, Octane is Very stable, and Very tough to get to burn (Requires High COmpression), Heptane is Unstable, and easy to get to burn..... SO Higher octane gasses actually Hold Less Energy then Lower octane gasses. and because of the Higher Octane content, They also Require Higher Compression to burn.... Meaning if you use High octane gas in an engine with low compression, Less of that fuel will burn = More wasted gas is being expelled through the tail pipe.
SO, Not only are you wasting $ by buing Higher Octane rated gas then you need, But you are also not getting any extra perfromance out of the engine... AND you are quite possibly Poluting more because of the extra unburned gas being pushed through the tail pipe.
Did you know that Higer octane gas is acutally Harder to burn? As previously stated, the Octane rating is the Ratio of Octane to Heptane in the fuel. of these two parts of the gas, Octane is Very stable, and Very tough to get to burn (Requires High COmpression), Heptane is Unstable, and easy to get to burn..... SO Higher octane gasses actually Hold Less Energy then Lower octane gasses. and because of the Higher Octane content, They also Require Higher Compression to burn.... Meaning if you use High octane gas in an engine with low compression, Less of that fuel will burn = More wasted gas is being expelled through the tail pipe.
SO, Not only are you wasting $ by buing Higher Octane rated gas then you need, But you are also not getting any extra perfromance out of the engine... AND you are quite possibly Poluting more because of the extra unburned gas being pushed through the tail pipe.
Last edited by Zzyzx; 01-04-2005 at 12:30 PM.
01-04-2005
#45
Registered!!
Join Date: Feb 2002
Location: GTA, Ontario, Canada
Age: 42
Posts: 155
Likes: 0
Received 0 Likes
on
0 Posts
Rep Power: 0 
01-04-2005
#48
O RLY
Hey! Look At Me!! I'm a Supporting Member!!
iTrader: (1)
Join Date: Dec 2001
Location: Milwaukee, Wisconsin, US
Age: 44
Posts: 10,031
Likes: 0
Received 0 Likes
on
0 Posts
Rep Power: 375
Originally Posted by Zzyzx
This is funny.... So you guys can Feel a difference Eh? with your Perfectly acurate "Butt Dyno"? Right.......
Did you know that Higer octane gas is acutally Harder to burn? As previously stated, the Octane rating is the Ratio of Octane to Heptane in the fuel. of these two parts of the gas, Octane is Very stable, and Very tough to get to burn (Requires High COmpression), Heptane is Unstable, and easy to get to burn..... SO Higher octane gasses actually Hold Less Energy then Lower octane gasses. and because of the Higher Octane content, They also Require Higher Compression to burn.... Meaning if you use High octane gas in an engine with low compression, Less of that fuel will burn = More wasted gas is being expelled through the tail pipe.
SO, Not only are you wasting $ by buing Higher Octane rated gas then you need, But you are also not getting any extra perfromance out of the engine... AND you are quite possibly Poluting more because of the extra unburned gas being pushed through the tail pipe.
Did you know that Higer octane gas is acutally Harder to burn? As previously stated, the Octane rating is the Ratio of Octane to Heptane in the fuel. of these two parts of the gas, Octane is Very stable, and Very tough to get to burn (Requires High COmpression), Heptane is Unstable, and easy to get to burn..... SO Higher octane gasses actually Hold Less Energy then Lower octane gasses. and because of the Higher Octane content, They also Require Higher Compression to burn.... Meaning if you use High octane gas in an engine with low compression, Less of that fuel will burn = More wasted gas is being expelled through the tail pipe.
SO, Not only are you wasting $ by buing Higher Octane rated gas then you need, But you are also not getting any extra perfromance out of the engine... AND you are quite possibly Poluting more because of the extra unburned gas being pushed through the tail pipe.
01-04-2005
#49
O RLY
Hey! Look At Me!! I'm a Supporting Member!!
iTrader: (1)
Join Date: Dec 2001
Location: Milwaukee, Wisconsin, US
Age: 44
Posts: 10,031
Likes: 0
Received 0 Likes
on
0 Posts
Rep Power: 375
Originally Posted by tbaleno
That link shouldn't convince anyone. Its a gas company trying to tell you you may need to get more expensive gas and trying to rationalize it.
01-04-2005
#50
Stop f*cking with me.
Join Date: Oct 2004
Location: Wrightwood
Posts: 295
Likes: 0
Received 0 Likes
on
0 Posts
Rep Power: 0 
Originally Posted by DaRickSta
01-04-2005
#51
up-up-down-down-left-right-left-right-b-a-b-a-start
iTrader: (20)
Join Date: May 2002
Location: London, Ontario, Canada
Age: 43
Posts: 7,785
Likes: 0
Received 0 Likes
on
0 Posts
Rep Power: 346 There have been tests done by Motor Trend and other reputable car magazines. Putting higher octane gas in a car meant to be driven on regular gas is a waste of money and can harm power. And... putting lower octane gas in a car that requires higher octane gas is a bad idea as well.
Motortrend actually used an M3 to test this and they used a bunch of other fuel economy cars. They were all dyno tested and the graphs proved their statement.
So.. like most of the guys said.... putting anything higher then 87 octane in our cars is a big waste of money.
Motortrend actually used an M3 to test this and they used a bunch of other fuel economy cars. They were all dyno tested and the graphs proved their statement.
So.. like most of the guys said.... putting anything higher then 87 octane in our cars is a big waste of money.
Last edited by R1Style; 01-04-2005 at 02:14 PM.
01-04-2005
#52
just a troll who likes to laugh at YOU.
Join Date: Sep 2004
Location: lafayette, IN
Age: 51
Posts: 282
Likes: 0
Received 0 Likes
on
0 Posts
Rep Power: 242 here's a better definition of octane rating:
http://auto.howstuffworks.com/question90.htm
an extra point i would like to make: the rating is based on what octane/heptane ratio the fuel _performs_ like. it's not just straight heptane mixed with octane (which would cost refineries a LOT more to make). the various streams in the refinery are known by such names as heavy/light naptha, heavy/light distillate, and about 10 other grades i can't remember the names of. they mix these in varying ratios to make different grades of gas. none of them are _pure_ anything (although refineries do make various pure products, like benzene or propylene, they're not in gasoline, as they're too expensive, or inappropriate, to put in gas). i guess the point i was trying to make is, don't go around telling people gasoline is just hept- and octane, as you will be wrong
/end chemical engineer rant
bottom line: obey the owner's manual. 87 octane is what our compression ratio is designed for, just as other cars (read as: real performance cars) require 91+ for their higher compression.
http://auto.howstuffworks.com/question90.htm
an extra point i would like to make: the rating is based on what octane/heptane ratio the fuel _performs_ like. it's not just straight heptane mixed with octane (which would cost refineries a LOT more to make). the various streams in the refinery are known by such names as heavy/light naptha, heavy/light distillate, and about 10 other grades i can't remember the names of. they mix these in varying ratios to make different grades of gas. none of them are _pure_ anything (although refineries do make various pure products, like benzene or propylene, they're not in gasoline, as they're too expensive, or inappropriate, to put in gas). i guess the point i was trying to make is, don't go around telling people gasoline is just hept- and octane, as you will be wrong
/end chemical engineer rant
bottom line: obey the owner's manual. 87 octane is what our compression ratio is designed for, just as other cars (read as: real performance cars) require 91+ for their higher compression.
01-04-2005
#54
Autocross Junky
Hey! Look At Me!! I'm a Supporting Member!!
Join Date: Oct 2002
Location: Las Vegas, Nevada, US
Age: 45
Posts: 7,211
Likes: 0
Received 0 Likes
on
0 Posts
Rep Power: 356
Originally Posted by varmin
an extra point i would like to make: the rating is based on what octane/heptane ratio the fuel _performs_ like. it's not just straight heptane mixed with octane (which would cost refineries a LOT more to make). the various streams in the refinery are known by such names as heavy/light naptha, heavy/light distillate, and about 10 other grades i can't remember the names of. they mix these in varying ratios to make different grades of gas. none of them are _pure_ anything (although refineries do make various pure products, like benzene or propylene, they're not in gasoline, as they're too expensive, or inappropriate, to put in gas). i guess the point i was trying to make is, don't go around telling people gasoline is just hept- and octane, as you will be wrong
/end chemical engineer rant
/end chemical engineer rant
05-18-2023
#55
Registered!!
Join Date: May 2023
Age: 41
Posts: 1
Likes: 0
Received 0 Likes
on
0 Posts
Rep Power: 0 Re: 93 Octane my car loves
our engines are designed for 86/87 octane. putting a higher octane in them won't change anything unless you have forced induction. it might actually be worse for the car. i met a guy who is a chemical engineer for exxon today and he just went over all of this with me.
Last edited by BrotatoChip; 05-19-2023 at 06:33 AM.
05-19-2023
#56
Super Moderator
Join Date: Jun 2012
Location: Ohio
Age: 31
Posts: 4,730
Received 1,865 Likes
on
1,311 Posts
Rep Power: 196 Re: 93 Octane my car loves
This thread is 18 years old, what are you doing
Thread
Thread Starter
Honda Civic Forum
Replies
Last Post
88AccordDX
General Honda Civic Forum Archive.
34
06-13-2004 07:45 PM
