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Old 07-07-2010, 08:10 AM   #1
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Default What gas do I use to pass smog?

So I have to pass smog again.
I'm thinking of ways that might help
I always fill up with shell, should I use Premium or just the regular stuff?
I know it runs a little quieter on the mid grade stuff but it just might be me.
What do you guys suggest?
Thanks
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Old 07-07-2010, 08:57 AM   #2
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Default Re: What gas do I use to pass smog?

Supreme, go take your car on the freeway for 15-20 to heat up your catilittic converter before you go to Smog,goodluck.
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Old 07-07-2010, 12:39 PM   #3
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Default Re: What gas do I use to pass smog?

Do you guys actually understand what octane helps with and what the cons are of running it?
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Old 07-07-2010, 12:48 PM   #4
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Default Re: What gas do I use to pass smog?

Quote:
Originally Posted by acmoc View Post
So I have to pass smog again.
I'm thinking of ways that might help
I always fill up with shell, should I use Premium or just the regular stuff?
I know it runs a little quieter on the mid grade stuff but it just might be me.
What do you guys suggest?
Thanks
The octane that your engine was tuned for would be best for a smog check.

Higher octane means more resistance to ignition, and you want all of the fuel to burn as easily as possible for a smog test. In addition, most premium fuels have detergents and such to clean out the fuel system, and the last thing you want is any of that gunk being burned during a smog test.

That means regular low grade on a stock engine.

And consider a bottle of
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or
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Old 07-07-2010, 01:16 PM   #5
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Default Re: What gas do I use to pass smog?

Us smog tech's recommend what the manufacture suggests. So Regular it is.

Remember if you run cleaners, such as injector cleaner, run it completely out of the system.
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Old 07-08-2010, 08:42 AM   #6
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Default Re: What gas do I use to pass smog?

Yea, I bought regular. I never saw that bottle up top though
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Old 07-08-2010, 09:17 AM   #7
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Default Re: What gas do I use to pass smog?

Quote:
Originally Posted by thesmogman View Post
Us smog tech's recommend what the manufacture suggests. So Regular it is.

Remember if you run cleaners, such as injector cleaner, run it completely out of the system.
Listen to this guy, he knows what he is talking about.
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Old 07-08-2010, 10:00 AM   #8
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Default Re: What gas do I use to pass smog?

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Supreme.
I saw the thread title and came in here to make fun of the idiots in this thread that were sure to give this as an answer. Stop giving advice on **** you don't understand retard.
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Old 07-08-2010, 10:08 AM   #9
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Default Re: What gas do I use to pass smog?

I concur
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Old 07-08-2010, 11:21 AM   #10
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Default Re: What gas do I use to pass smog?

Quote:
Originally Posted by ILcrxsi1 View Post
I saw the thread title and came in here to make fun of the idiots in this thread that were sure to give this as an answer. Stop giving advice on **** you don't understand retard.
It's not really going to matter which grade of gasoline you use if your engine is running properly.

Its post like these that are making Honda-Tech a shitty place to get advice, that's just uncalled for. Especially since you didn't even give any reasons why your opinion might be right.
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Old 07-08-2010, 11:34 AM   #11
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Default Re: What gas do I use to pass smog?

not sure if it'll make much of a diff, but i'll throw it out there. i hear stories where you can try E-85 with slightly bigger injectors...440cc injectors are what i've heard to maintain performance and get better emissions.
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Old 07-08-2010, 12:55 PM   #12
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Default Re: What gas do I use to pass smog?

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not sure if it'll make much of a diff, but i'll throw it out there. i hear stories where you can try E-85 with slightly bigger injectors...440cc injectors are what i've heard to maintain performance and get better emissions.
One would need to retune for E85, before it will run right.

E85 needs more fuel for the same amount of air.

Though, I suppose an engine running rich could be leaned out with some E85 added to the tank, the challenge would be getting the mixture right to not run lean, which raises NOx pollution.
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Old 07-08-2010, 01:09 PM   #13
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Default Re: What gas do I use to pass smog?

+1 on the heet in the gas tank
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Old 07-09-2010, 10:29 AM   #14
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Default Re: What gas do I use to pass smog?

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+1 on the heet in the gas tank
I heard of that too
Not sure why supreme would be better. doesn't it just have more cleaner
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Old 07-09-2010, 02:40 PM   #15
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Default Re: What gas do I use to pass smog?

Iso heet works.
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Old 07-10-2010, 12:49 AM   #16
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Default Re: What gas do I use to pass smog?

Your gonna need BP gasoline.
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Old 07-16-2010, 02:16 PM   #17
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Default Re: What gas do I use to pass smog?

I failed =[
All numbers too high, everything else was good
The guy id I have an air leak
too much or too little fuel in the combustion chamber but too much raw gas out the muffler
That crc stuff works?
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Old 07-16-2010, 03:37 PM   #18
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Default Re: What gas do I use to pass smog?

Quote:
Originally Posted by acmoc View Post
I failed =[
All numbers too high, everything else was good
The guy id I have an air leak
too much or too little fuel in the combustion chamber but too much raw gas out the muffler
That crc stuff works?
Not for that.
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Old 07-16-2010, 10:27 PM   #19
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Default Re: What gas do I use to pass smog?

Quote:
Originally Posted by acmoc View Post
I failed =[
All numbers too high, everything else was good
The guy id I have an air leak
too much or too little fuel in the combustion chamber but too much raw gas out the muffler
That crc stuff works?
time to bribe.
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Old 07-17-2010, 09:29 PM   #20
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Default Re: What gas do I use to pass smog?

You need to post the numbers for some help. Any additive you try adding to the tank is not going to work. There is something fundamentally wrong with your engine.
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Old 07-18-2010, 01:08 PM   #21
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Default Re: What gas do I use to pass smog?

How should I use this heet stuff? Cuz it says it treats 20 gallons of gas but I'm guessing I won't want it that diluted to pass smog right?
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Old 07-18-2010, 01:10 PM   #22
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Default Re: What gas do I use to pass smog?

Ps I have a 94 gsr motor so what octane fuel should I run it with
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Old 07-19-2010, 08:40 AM   #23
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Default Re: What gas do I use to pass smog?

Quote:
Originally Posted by Hella_Reno View Post
Ps I have a 94 gsr motor so what octane fuel should I run it with
Buy regular, all gas in the U.S. is the same octane

I'll post my umbers later
My timing was 19 TDC
The tech told me I have an air leak and too much built up carbon in my engine

I have a sohc zc with dc sport header AEM CAI and tanabe medalion exhaust.
Car is a 91 crx
I set the timing on the cam gear back two degrees, so I assume now it's at 17 TDC
I checked my fuel pressure and it's at 42-43 psi
I had changed my oil and poured some engine restore in, had 400 miles on it so far
I know my IACV is going out so I cleaned it real good before the test
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Old 07-19-2010, 08:43 AM   #24
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Default Re: What gas do I use to pass smog?

What does the iso heet do?
Do I run it through or run it in the tank during the test?
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Old 07-19-2010, 11:35 PM   #25
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Default Re: What gas do I use to pass smog?

Yeah I'm wondering the same thing, and how much fuel should I add it too? Cuz it says 20 gallons but I don't have a 20 gallon tank obviously and I know it's not intended for passing smog, so should I add it to like a half tank or 1/4 or what?
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