what kind of gas do you use?
 

hello all.. just wondering what kind of gas you put in your civics? i use ULTRA 94, but this week i put some petro canada 87 in :tsk: and my car drove like garbage, jerking and hesitating.. sigh.. never again.

Ultra 94 here baby...

These J-Spec motors don't like our low octane north american gas so dump in 91 min.

I prefer 94 with octane boost, nice and smooth.

Regards,
OK

Ultra 94 here as well.
i tried that octance booster once, damn felt very smooth, but i'm too poor to pay for octance booster and .91+ gas prices :(

so far just the cheap shyt..
runs fine for me..

I use to run the premium stuff... but after a while.. Marty told me that it was a waste of money.. now i pop in the cheap **** and I notice no difference in power.

As a matter of fact... I believe some studies by the government showed that pumping premium fuel into your car when it doesn't ask for it, does not improve performance.

Unless your car asks for it, you don't need the premium stuff. Cars like Benz, BMW, Lexus... when they ask for premium.. you should use premium cuz they need the extra octane... but Alliston made Hondas Civics don't need premium, it's just a waste (according to studies.. and my first hand experience in my cheapy 7th gen):shrugs:

regular for my dx engine, anything above is no good (for regular use)

sunoco 94 + octane booster :yummy:


even at .96 $25 still fills my car to the top :thumbup:

What he said. :dito: (ditto spelled with 2 Ts because that's the correct spelling :D )

Regular Petro Canada for me. Can't afford the other good stuff. If it really is good, only your engine knows. Ask Mr. D16y7 and he'll say no difference.

Joker

the cheap stuff... the d series engine in my car is timed to provide power with that octane level...if I rise the octane level I slow the burn down and reduce power (also my gas milage drops by about 150 km per tank with the 94 ultra stuff...)

"sunoco 94 + octane booster


even at .96 $25 still fills my car to the top"



gotta love those crx gas tanks:thumbup:

How much do you guys pay for the octane boosters? Aren't they like 25$, also, how much do the REALLY boost the octane?

my eg civic hates 94. the bimmer. well, it luuuuuuuuuvs it

That's true.

I didn't want to say it because I didn't want people to think I Was on crack.. but higher octane fuel burns slower..

In my D17A1 engine... it reduces my acceleration (from what I notice)... and my fuel mileage drops quite a bit. I use to be down to 350-400 km a tank when I used the premium stuff... but now I'm back to the cheap stuff and I can easily get 600 km to a tank if I keep my revs below 3000 at all times.

For the winter car Petro Canada regular gas.

For the "Beast" Ultra 94! :D

By the way, while I was in Cyprus I noticed that they had reg gas and unleaded gas. And for unleaded they had reg. or super, reg. was 98 octane and Super was 104 octane. Race gas at teh pump! :thumbup: :D

Sunoco 94 for me. Who ever said that using higher octane gas is a waste is unfortunatly worng. It really depends on what engine you have. The JDM engines need the higher octane to perform to full potential as they are higher compression engines.

Engine's are designed to work with 87 otane. That's all you need unless you've done extensive motor work or have a turbo.

I use Ultra 94. It's expensive yes. But, it's a cleaner burning fuel and also increases my gas mileage. But, more importantly for me is the cleaner burning part. My piston chambers are cleaner than most people's. As well, it doesn't produce as many harmful polutants into the air.

Really? I thought the higher octane it was.. the worse it was for the environment... that's why Diesel is worse than Unleaded... And jet fuel is worse than Diesel..

I'll look that up again.

Sorry Rice Burner but you are mistaken and/or misinformed. In Japan the lowest octane they have is 94. If your statement is true then explain this to me why the ONE time that I had to put a lower octane gas in my car with a JDM engine(There wasn't a Sunoco around on the way back from St. Thomas dragway) was it sputtering and running shitty?? I'm not the only one either lots of people will tell you this. While your post is true for most USDM engines, JDM engines need the higher octane for the higher compression to run properly.

No spleeny The 94 octane at Sunoco states that it is more enviromentally friendly. If this is true or not I don't know but it sounds logical.

In my first post.. I said that "only" if your engine asks for "Super" grade fuel, do you actually need it. Maybe in Japan, all the grades of fuel start from "Super".


If I don't remember wrong... Diesel fuel is like 110 octane? Look at all that black smoke coming out... I believe there was a study that showed that higher octane polutes more than lower octane. Maybe in the 94.. because it's so dirty.. they added emission cleaners and stuff.. I have no idea. I'll do some more research.

If the lowest octane in Japan is 94....... and 94 is cleaner (cuz it's higher octane).. why is the smog levels in Japan ... ahem... crap? To be honest.. our smog days must not even be half as bad as the smog days in Japan. If I don't recall wrong.. our air pollution index goes to like 50 on bad days.. but goes to like 90 in Japan. (32 is Satisfactory)

I wasn't posting the first part of my post to you it was directed towards rice burner.

Now the second part which was directed towards you I say that, that is what Sunoco states I'm not sure if it's true or not. But think about it, with all of the emissions **** getting out of hand recently and Ontario being so strict with that **** don't you think the government would flip out if they said it was less pollutant but in actuality it was more? Juss my 0.02 but in all fairness I don't know so you could very well be right

fill up with high octane, reset your ecu
it'll adjust to the new octane, and you get 'free' power...

i read that somewhere

Ultra 94 about 90% of the time, if I'm not near a Sunoco, I'll use whatever Premium.

coupe95 you are correct, higher compression engines require the higher octane fuel, that is why my owner's manual tells me to use 91 octane or higher.

:richslap: No Spleeny
The smog in Japan is so much more than ours because of the population, they have more people in less space!!!!

yup.. higher the octane the more pure the gas is

Higher compression engines require better fuel. That is correct... but I'm saying if you drive a car that says you only need 87 octane in the manual.. you don't necessarly need high grade fuel.

Even some lower compression cars need super fuel.

If I'm not mistaken.. the WRX is 8.3:1 compression before the turbo boost.. and that requires premium... partly cuz the compression is way above that when the turbo kicks in. :)

If that's the case.. why can't we gas up with Diesel? That stuff has more octane than ultra 94 + those NoS octane booster bottles.:confused:

Here is a link for octane levels in fuel: It is a pretty long Q & A so I'll just post the link

http://www.total.co.za/External_cont...rol_octane.htm

I just found out that octane has nothing to do with cleaner air, emissions are caused by how your car burns the fuel and how it distributes the by products. Actually from reading some of these sites, the lower emission cars use lower octane gas. But they are lower compression, not boosted engines. (lower performance??)

As for diesel it is a totally different refinement process from that of regular gas.

NoSpleeny...yes, this is correct. My car only requires 87 octane unleaded fuel but, because I work on my own car, I like to keep my car clean and running properly...so I spend the extra money to ensure that future problems can be minimized.

Try it...I had one client do that and we discovered he was running diesel fuel in an unleaded fuel running engine...the damn thing blew up sky high. There are more volitial organic compounds in diesel fuel...the combustion process found in an unleaded fuel burning engine is not the proper way to combust diesel fuel. This is why we don't put diesel fuel in our engines. If you do by mistake, take a hole and funnel it out quickly...you can "seriously" damage your engine.

yes, this is true. Emissions are caused by how your car burns the fuel and distributes the by products. But, if your emission systems are working up to par, and are registered for regular cheap unleaded fuel (dirty fuel), it goes to say that, with ultra 94(cleaner fuel), the emissions will be cleaner of volitile organic compounds (VOCs) being that it takes less gas to travel as you would usually need to because of a slightly higher performance ratio and cleaner burning process. Since it is Volitile Organic Compounds (VOCs) and Ozone (Oz) that combine in the presence of sunlight to create smog, if you have less VOCs, there is less chance of smog. That's why I recommend to all my clients before they take an etest is to do an oil change, top up on 94, make sure your plugs are clean or replaced, check your wires, and top up all your fluids. For an older car or otherwise, this is the best course of action.

the higher the octane level the slower the burn rate ... the timing has to be corrected for the type of gas you use...

I would think it has a higher burn rate. Being that higher octane burns better ergo, faster and therefore have a higher/faster burn rate. True???

Apparently not. Gatherer must have heard or read it somewhere....

I've heard and read it somewhere ALSO that higher octane fuel burns slower than lower octane fuel... Cetane fuel burns EVEN slower than octane fuel.

Alright, if this was true, then why would cars that require premium gas need it then??? If it burns slower, then it robs of horsepower. So for a car that needs 91 octane, it would gain horsepower from 87 octane because it burns faster....according to your statement. But, we all know this is not true. So, why would you think it burns slower??? :confused: Where ever you read this, I'd like to read it too...if you can please find the link or picture of what you read...It would be interesting to read.

What you may have read is higher octane burns slower as far as how much fuel pressure you need and therefore save on gas mileage.

Hrm..

I'll try and find it but for now.. I'll theorize... it could be that if the compression is LOWER then it burns slower.. but when the compression is higher.. it burns just as fast?? I dunno...

You can consider Napalm a really thick gasoline I guess.. that burns pretty slow...

I would imagine higher octane would give you more torque because it's slower burning.. I dunno... I'm guessing at these things. I'll read up more and give you the article if I see it.

thats one of the stupid things about the octane system however the higher octane burns slower...lets think of it logically

if you use pump gas (87), with the stock honda engines you leave the timing alone no need to play with it factory timing is fine.

lets say you use 110 octane race fuel, what way do you change your timing ...advance or retard?

you advance your timing, this is so that the spark happens sooner in the cycle allowing more time for the crank shaft to move into the best position to be in when the combustion chamber reaches maximum pressure.... therefore if the combustion chamber is taking longerto reach that max pressure and therefore the gases must be burning slower...

the higher the octane the slower the burn rate... on Diesel fuel is more stable then the unleaded gas thats part of the reason diesel engines have a huge compression ratio of 40:1 or more

That's also why their strokes can be HUGE.. therefore outputting TONNES of torque!