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Old 02-26-2002, 04:54 AM   #1
Mike Smith
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Join Date: Jan 2000
Chapter/Region: Tri-State
Location: Middlesex, NY USA
Vehicle:
00 BRP RS Coupe
02 Forester, 00 S-10,

Question Best fuel additive?

There's so many out there now (STP, Gunk, etc.), is one really any better than another?
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Old 02-26-2002, 08:28 AM   #2
live311
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2008 Outback

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None of them are really worth it. You certainly don't need to use them as often as they recommend (if it's not broken, don't fix it). But if your car is running crappy give it a try. It certainly won't make it worse. As for which one is better, I couldn't really tell you. I always went for the ones that claimed to do the most (and thus cost more). But I've never used any of that stuff on my RS.
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Old 02-26-2002, 09:02 AM   #3
Barry
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WRB SEDAN

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Red Line Fuel Injection Cleaner- least abrasive to your fuel system components. Can be used as often as necessary.

Barry
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Old 02-26-2002, 11:40 AM   #4
Mike Smith
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00 BRP RS Coupe
02 Forester, 00 S-10,

Default

When I had my Justy, the dealer recommended a bottle every third tankful. Is the RS running crappy? Well, it does have the dreaded hesitation problem between 3500-4500 RPM and it occasionally goes into the on-off mode when it comes to throttle position - cresting a hill and back off slightly to hold speed, and the throttle just shuts down completly then pops back on when I push down a little
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Old 02-26-2002, 11:46 AM   #5
Mike Smith
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00 BRP RS Coupe
02 Forester, 00 S-10,

Default

When I had my Justy, the dealer recommended a bottle every third tankful. Is the RS running crappy? Well, it does have the dreaded hesitation problem between 3500-4500 RPM and it occasionally goes into the on-off mode when it comes to throttle position - cresting a hill and back off slightly to hold speed, and the throttle just shuts down completly then pops back on when I push down a little
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Old 02-28-2002, 10:35 AM   #6
Kyle Paton
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Redline works the best. I even use it in my sports bike.

Kyle
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Old 02-28-2002, 12:58 PM   #7
RRinDC
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Glacier White/Slate

Talking Chevron Techron...

...works for me.
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Old 02-28-2002, 01:51 PM   #8
tmat3
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BRP

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I was told to stay off any fuel additives except during the winter, I add dry gas once every once a while.
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Old 02-28-2002, 01:54 PM   #9
tmat3
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BRP

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Wait, you wrote,

Quote:
Well, it does have the dreaded hesitation problem between 3500-4500 RPM and it occasionally goes into the on-off mode when it comes to throttle position - cresting a hill and back off slightly to hold speed, and the throttle just shuts down completly then pops back on when I push down a little
You get that too? I sometimes get a feeling like the red line limiter kicked in around 2000RPM on 2nd/3rd gear. Or, more like fuel filter got clogged up. But, if I let go the gas and step on it again, it goes away instantly. Like I said, put some dry gas in it and see what happens. You may have moisture in the gas line.
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Old 03-03-2002, 12:21 PM   #10
MackDaddy
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I've always used Red Line, or Chevron Techron at every oil change. Done this with the past 5 cars (20 years,) and never had fuel system problems.

Jim's .02
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Old 03-22-2002, 06:13 PM   #11
Redleader
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STi swap luvin it!!!

Smile

In my other hoopdy(Chevy Tubro Sprint) with 157,000 miles I've always used Chevron Techron gas and additive with no probs.

Redleader
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Old 03-23-2002, 12:14 AM   #12
Jademonkey
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Red

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Another vote for Redline! ~$5 at Pepboys.
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Old 03-23-2002, 05:51 PM   #13
ColinL
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'01 Erion CBR 929

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Chevron Techron.
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Old 03-25-2002, 10:04 AM   #14
alfaguy
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I corresponded with a former Chevron engineer on this topic, his recommendation was to use Techron twice a year, and never more than 2 bottles per oil change as this can cause the oil to become diluted.
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Old 03-25-2002, 11:16 AM   #15
vvk
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1998 Impreza 2.5RS
BDP

Default Berryman Chemtool

I've had great results with Barryman Chemtool B-12. Get the one sold in metal cans -- it's the strongest. It is usually available for under $2.50 at Walmart/K-Mart, PepBoys, etc.

You may want to try cleaning your throttle body. Gunk from the PCV system often accumulates on the bottom of it, causing idle problems, etc. Take off your air box (the one closest to the throttle body) and spray some carb/intake cleaner in there. Wipe thoroughly with a clean rag. Move the throttle plate out of the way with one hand and try to reach as deep as possible with the other while cleaning. Then spray some more carb/intake cleaner in there, applying as much pressure as possible. Assemble the air intake and start the car. Bring it up to about 2k rpm. It may run rough for a while and may blow some black smoke out back. This is normal, part of the cleaning process.

A good carb cleaner is, again, Berryman Carb Cleaner with B-12. Cheap and very effective. They also make a dedicated intake cleaner but I've never seen it in stores.

http://www.berrymanproducts.com/
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