premium or regular?

someone told me that I should only put supreme or premium (depends where you buy it) in my car, cuz it burns cooler, slower and more complete or something like that, he is a long-time mechanic also(not for a shop thoi, just for himself, but he knws what he is doing) and a friend told me that since he looked it up on autotrader model info, and it says that it only requires regular that premium wont do anything better, he also said the auto-shop teacher told him this.
who is right?

The difference in the regular and premium octane gas how much it can be compressed before detonation. Detenation is when the gas combusts before it is supposed to. This all depends on the compression ratio of your car. In a non-vtec integra, the compression ratio is somewhere close to 9.4:1 which means it only requires regular octane gas. Putting premium will only cost you more money. Dont use premium unless it specifies. I have heard that using a higher octane gas when it doesnt need it will leave deposits on the intake valve over time.

read your manual. whatever your engines octane rating is that is what you should put in your engine. no more, no less. all integras are rated at regular octane gas. the higher the octane you feed it, the more wasted gas and money you will use. you will actually burn higher octane faster than lower. so will fill more and spend more money each time you fill.

Originally posted by threethirteen
read your manual. whatever your engines octane rating is that is what you should put in your engine. no more, no less. all integras are rated at regular octane gas. the higher the octane you feed it, the more wasted gas and money you will use. you will actually burn higher octane faster than lower. so will fill more and spend more money each time you fill.

actually my 95 gsr said premium unleaded only

Originally posted by slowANDfurious


actually my 95 gsr said premium unleaded only

GS-R and Type-R will say Premium Only in the manual and even on the dash...

ok, but when suipercharged is 87 still enough, or would i then go up to 91-92

any form of forced induction increases the chance of detonation form the end gases in the cylynder buring at, or before, the same time the flame front starts. The trick to slowing down combustion is to increase the octane.
So, in short, if you supercharge the car in any fashion (turbo or mechanically driven superchargers or nos) you need to up the octane rating.

Originally posted by higgimonster
http://www.automotiveforums.com/vbulletin/avatar.php?userid=15699&dateline=1013729335

:spit: Bahahaha! Nice Avatar!!!

The evil monkey in Chris' closet :hehehe:

Sorry to go OT, but I believe this issue is solved.....:cool:

ok cool, I was just wondering because I am hoping to do one of the 3 FI. well, tonight i filled with regular since i guess id get worse mileage with supreme right?

Originally posted by 94tegRS
ok cool, I was just wondering because I am hoping to do one of the 3 FI. well, tonight i filled with regular since i guess id get worse mileage with supreme right?

I am not too sure about that, but putting premium gas in your car every once will not be bad for your car because the additives will help clean your system out a bit. :cool: But I agree, putting it in every time would be kind of a waste right now with your RS...Save the extra money for your F/I :D

Honda reccomends putting 86 octane or higher in any of the cars. here in Colorado we have 85,87 and 91. I usually put in 87 and some days when i feel lucky i put in 91. :D

Good Lord, you have 85? Who the hell buys that? I would never touch anything under 87 for a normal car. 85 does not sound good...Must be really cheap though :D


:bandit:

85 gas is running .99, 87 is $1.11 and 91 is $1.23. Not too bad but like i said i only ran 87+. I refuse to put anything but 91 in my 00 Si. :D

well here it is 87,89,91 and oit is 1.29, 1.39, 1.49

some times if you fogo to a different station it is 87,89,92 and these pumps are overtown though so it is like 1.03, 1.17, 1.27

I always have put Premium in my GS-R. Thats what the manual and dash says.

The manufacturer is always going to know what gas to use over some "long time mechanic" and it should tell you what ocatane you need in like 5 places in or on your car.

And I cant believe that 85 octane that guy has! I heard thier having some sort of shortage on high octane fuel on the west coast I think because so many people consume it and thier just isnt enough but I had no idea they went down to 85! Here in the midwest I can get from 87 to 93 almost everywhere. Imagine that, on the west coast where youve got plenty of sports cars and tuned or FI vehicles you cant get anything over like 90....and here in the midwest where most vehicles on the road are SUVs, minivans, and big old V8 farm trucks we get 93 but there almost no need for it. Crazy.

well, yeah I know the manufatcurer will know what it needs, but he told me that supremem is better, he never said that is what it neded but he said it is better to use it.

Wow....you guys miss out on the octane rating we get here.

Regular unleaded is usually about 91 and normal premium unleaded is 96. However we have specialised premium unleaded fuels, such as the Shell Optimax, Mobile Synergy, and BP Ultimate which all have 98 ratings. Also BP are working on a 100 Octane premium unleaded to be released soon.

I only use 98 octane premium in my teg :D

well, why do companies have fuels ith that high octane rating If they are unnecessary and actually dont work better at all. No cars need 100 octane do they, or is that for he built FI cars around there

Well its useful for the modified cars here, plus the better the fuel, the better imports we can get over, as some of the jap models were not able to come over in the past because the fuel wasn't good enough to cope, the more we improve the fuels, the more likely we'll get the jap spec models over here.

Okay once in for all; I own a 97 Acura Integra GSR, and is it really necessary for me to put in 91 gas in it? Am I doing harm to my engine by putting in 87 gas?

I am really strapped for cash these days, so I don't want to buy 91 fuel unless I am doing considerable harm to my GSR by buying 87 gas...

So what's the right answer?

i'd say just pay the extra and put the 91 in. i heard that it gives you better gas milage and it almost evens out in the long run anyways and ends up being better on the engine.

with the 87, if you're driving around, and for some reason all the gas thats injected dosn't get burnt thanks to the lower octane amounts then, you will get detonation and mess up your pistons. The gases get compressed as hell in there and anything you can do to make combustion a little more easier, you should do. If you must buy cheaper gas, then stay away from higher RPMS. Maybe even sell the GSR and get an LS, or just switch to lower compression pistons.

Why would you sell the GSR and get an LS? Does the LS require lower octane gas?

here on the east coast, North Carolina we have 88 @ 1.12, 92 @ 1.27, and 96 @ 1.43. 88 works for me then I run the tank down to empty,then fill it 1/8 way up w/ 96 when I go to the drag strip, or regular V-8 ass kicking.

the shell down the road does have 101 @ $1.70 per gal though

Why would you sell the GSR and get an LS? Does the LS require lower octane gas?

Yes, the LS is only like 9.2 vs. the GSRs 10.0 and the Type Rs 11.0. 87 is all thats necessary

oic... i think i'd still put the 91 in it..

ok im going to answer this question once and for all. in my hand is the 1992 acura integra manual and what ever it say goes.

for your integra (except gsr), it operates most effectively on unleaded gas with octane rating of 86 or higher.

for gsr, it operates most effectively on premium gas with rating of 91 or higher, but if premium unleaded gasoline is unavailable, regular octane may be use. the engine will compensate for lower octane, but u will notice slight decrease in power.

the information given was a paraphrase of the manual, but if u guys want the exact word. i can do that also.

i for one use the 91 octane 95% of the time on my 92 ls, it can't hurt and better for the longevity.

just use chevron gas, they put cleaners in their gas and it burns more cleaner

yeah thats what i've heard isnt it called Chevron with Techron or some thing?

Thats what I get 99% of the time. Its good. It costs more, but its not that big a deal.

I put 92 or 91 in my 95 GS-R and find that I get the best form it. There is a gas station down the road that has 110 octane!!!!!!! I have been told many times though that putting an octane that high in your car without having alot of mods on it then you will actually lose performace because the car doesnt run well as using a simple 91 octane.

haha...guys this is a 9 month old thread.

start a new one if u'd like to discuss it.

well here it is 87,89,91 and oit is 1.29, 1.39, 1.49

some times if you fogo to a different station it is 87,89,92 and these pumps are overtown though so it is like 1.03, 1.17, 1.27


HOLY SHIT......here in NY its 1.69 for 87 1.8something for 89 and 190something for 91 consider yourselves lucky the gsr's around here get killed with that and its real bad for the soccor moms and there suvs

someone told me that I should only put supreme or premium (depends where you buy it) in my car, cuz it burns cooler, slower and more complete or something like that, he is a long-time mechanic also(not for a shop thoi, just for himself, but he knws what he is doing) and a friend told me that since he looked it up on autotrader model info, and it says that it only requires regular that premium wont do anything better, he also said the auto-shop teacher told him this.
who is right?

You're wrong Mr. KrNX, its a YEAR and 9 months old, from the original post which is above.

in Vermont i pay 1.56 for 87. and there is practically no wherere that you can get free air. it sucks!

You guy are so cheap. Premium gas will make your engine cleaner, leave less deposit inside engine, run smoother, more milleage per galon, and also give bit up in performance. I live in canada and our gas is more expensive than your and i always had run all my honda`s(86 prelude se, 84 civic 1500s, 89 civic si vtec and my 92gsr-r) with premium and i always notice the difference. The difference for a full tank is maybe 2 dollars!!!

i put 91 on my civic (91 i think is the highest in our area). even if honda recommends 86 or higher, its a cleaner burn with higher octane rating. i used to put 87 then shifted to 91. you do get better gas mileage with higher octane rating and the difference with the 87 and 91 is minimal in price. the better gas maileage of 91 will compensate for the price when compared to 87.