Which type of gas is better for GS auto? 87 or 91 or 93

[ouyangcui]

Which type of gas is better for GS auto? 87 or 91 or 93

[90gs]

higher the better for the most part unless you put like 110 octane race gas in a stock car...

thats lame, in my state theres only 87, 89, and 91... i want 93!!

[ouyangcui]

My car is GS auto, no VTEC, and manual recommented to use 87.

[92teggsr]

you should be fine with regular gas. If you ever bump up your compression make sure you use the good stuff though.

[90gs]

the manual says "above 86".. i have a 90 GS with an intake (thats it) and if i use anything but 91 octane chevron gas i get 25 mpg. if i use 87 octane chevron ill get 25 mpg, if i use 89 octane i might get 26. if i use any brand of gas other than chevron and any octane other than 91 it accelerates slower and gets real bad mileage... with 91 octane chevron i get 31-32 MPG... i regularly use fuel injector cleaner too (every other tank)

[Melt]

you guys are trippin. If you drive a stock (by stock I mean no internal mods) GS (which I assume has a b18a/b) then put 87 in it and be done with it ... I cant believe how many people put 91 in their civic dx's and always tell me about how much better it is. I have a SOHC ZC and I STILL use 87 and it does me just fine.

[90gs]

thats because the cheap 87 octane scummed up your injectors so badly that when you put 91 octane in it doesnt make a difference... try putting in some fuel injector cleaner along with a full tank of 91 and if you dont notice a difference theres either a problem with your car or you have very low perception capabilities

[Melt]

87 aint that fuckin cheap bro ... have you been to a gas station lately plus I commute 80 miles a day so it isnt practical.

[KrNxRaCer00]

use 87...won't hurt the motor, should run fine. (since ur not really runnin that high of a c/r). 91...wasting money some what, but i guess u do wut u gotta do

[90gs]

i think that 91 really does help... i usually get 350 miles to a tank with 91 octane chevron, and 300 on 87.. did this with my last integra too.. and ill drop to 25-27 mpg even on chevron 91 octane gas if i dont use fuel injector cleaner every other or every third tank...

[Melt]

you do know that fuel injector cleaner is just kerosen thats been rebottled and marked up right? ... dont believe me, heres the proof.

Originally posted by stackz @ superhonda.com
some of you might remember that I'm a microbiologist and I work for the FDA here in smoglanta...

anyway, they sent me off the past two days to the regional AOAC meeting (american association of analytical chemists) and yes, it's for both microbiologists and chemists.

I got bored with the micro presentation on campy around 11 this morning and wandered across the hall to the chemistry presentation...

guess what I saw haha...

gas spec graphs of quite a few different things...

1. Charcoal lighter fluid from wal-mart $3.95 per 20oz. can.
2. STP fuel system cleaner $4.95 per bottle.
3. (brand name can't remember) Carb/fuel injector cleaner $2.95 bottle.
4. (brand name can't remember) Gas tank water remover $6.95!! a bottle!!!
5. kerosene straight from the gas station...$1.03 a gallon...

the gas spec graphs for ALL of them were identical!! hahahaha...I just about fell out my seat. I've known for a while that lighter fluid and fuel injector cleaner MUST have kerosene in it to some amount but didn't know they were STRAIGHT kerosene!!! I even waited until the end of the presentation and asked that since some of the peaks looked smaller on a few of the different graphs if there wasn't anything else mixed in....He brought them back up and said, "nope, as you can see we just got tired of wasting three sheets of paper so we squished the graphs down to one sheet before converting to the power point version"

from now on I'm going to just fill up a gallon container with kerosene and add the appropriate amount to my gas tank...hahaha no more high prices for cleaning and de-watering the gas tank in the cars...

[PWMAN]

I have a clear fuel filter on my truck, and you should see the difference between 87 and 89! 87 has a whole bunch of crap floating in it, 89 is almost totally clear. No big difference between 89 and 93 though.
For the B18A/B the lower octane the better. Octane is the resistance to compression, the B18A has low compression therefore does not need higher octane. Lower octane has more BTU's so it actually makes more power, you only need higher octane because of higher compression to resist against detonation. But get 89 though cuz of the floating stuff in 87.
You guys all think higher octane gives you more power? It's been dyno proven already that it doesn't. Of course, with higher octane you can turn the advance up some and get more power, so thats what I think newer cars do - they have computers that turn advance up as much as possible without letting it knock/ping, so when you put in higher octane it turns up the advance. But if you could leave the advance set in one spot, lower octane makes more power.
And also, mileage wise - it's not worth how much it costs you get a couple more miles per gallon on high test.

[Melt]

I had a 73 MGBGT that also had clear fuel filters ... 3 of them in fact. The gas didnt have floating shit in it .. there was dirt in the gas tank! Which is the case on many older cars

[PWMAN]

Originally posted by Melt
I had a 73 MGBGT that also had clear fuel filters ... 3 of them in fact. The gas didnt have floating shit in it .. there was dirt in the gas tank! Which is the case on many older cars

There was no dirt in the tank. I've gone back to 87 and checked my fuel filter again and it had crap in it. Went back to 89, clear.
3 fuel filters? Why?

[-The Stig-]

Originally posted by PWMAN


There was no dirt in the tank. I've gone back to 87 and checked my fuel filter again and it had crap in it. Went back to 89, clear.
3 fuel filters? Why?

Cause its british.. haha...

I worked on a fuel dock a few summers back, and i've learned that any brand you can think of all comes from one refinery. Thus thinking a certain brand is better is kinda redundant.

The particular brand we worked under was 76/Unical, but we'd regularly get trucks from GP, Chevron, Arco etc. etc..

Only time I get nervous of the brand of gas is when im in the middle of no where and its Joe And Franks Last Stop gas station or some random shit... then I wonder if I'm really getting gas or just mixture Gatorade and Piss.