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Maintenance & Repair Fuel and Oil Additives
1246 messages, Last post on Sep 28, 2009 at 7:37 AM
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Replying to: isellhondas (Jul 01, 2008 1:45 pm) You got my attention - are you talking in the combustion chamber? If so, how'd you use it? I've just added Rislone to the oil, wouldn't think that'd help in the combustion chamber.  edit - let me ask the more general question - my '95 Suburban knocks on regular due to carbon buildup. Techron helps some, but I've always wondered if there's something else that might do more. Suggestions? |
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You can do a "carbon blast" where you introduce a strong solvent through the intake system. I've seen old timers use a water bottle with AMAZING results too And a quart of Rislone poured in the motor oil works too but I'm not exactly why? Opatience?
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Replying to: isellhondas (Jul 01, 2008 2:23 pm) For deposites inside the combustion chamber it would have to be something added to the intake stream or fuel. Top oils have been used in the past. People even dribbled them directly into the air stream to saturate the deposits. Then let it sit and when restarted the deposits will blow out. GM has a chemical for that they sell over the counter IIRC. Or you can just take it on a good long drive at good speed to burn away the deposits. |
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I've been lurking in some gas talk forums and also speaking to an acquaintance who is a Volvo mechanic. Everyone seems to agree not to waste your money on any fuel additives. If you plan to sell your car, go ahead and use them, otherwise don't because it causes a lot of gumming up. It also makes no difference in cleaning out any gum or varnish that may accumulate...the same with carbon. Apparently, even Techron that you buy at Chevron in a bottle is not the same formulation as the Techron that is in the pumps. This info kinda sucks because my Mazda has had it's intake cleaned a few times already under warranty. I don't know why it keeps gumming up, except for the fact that I occasional have used some Redline fuel additive whenever I gassed up at cheaper (no name) stations that just so happen to have a higher sulfur content than those like Shell, Chevron, or Texaco. I was also told to stick Top Tier fuels and every once in a while add some premium with added detergents, but the latter in my car won't do anything because the PCM will adjust for the premium fuel, supposedly. |
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Replying to: isellhondas (Jul 01, 2008 2:23 pm) It act like a jack hammer. But if a person doesn't know what they are doing, they can bend a rod or valve in a hurry with water. Risilone has some pretty hefty solvents in it that are pretty good at eating away at carbon deposits. Generally, we don't see a lot of carbon problems on the newer vehicles, unless they have had problems with the emissions, PCV system or lack of maintenance. I've seen a lot of confusion about additives and actual cleaners. 3M makes a great injector cleaner, but it isn't something you just add to the fuel. You run it through the fuel lines. And GM makes a pretty good intake cleaner (GM Top Engine Cleaner), that is designed to clean the intake system. And it isn't just something you spray into the intake and drive away. |
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I'm hearing about an additive that was developed by NASA and is marketed as an engine treatment which can reduce repairs by 85% and increase gas mileage by up to 20%. It's called Motor Silk. It comes in a kit to treet the engine, transmission and fuel system. It is suposed to treat the metal and last for 100K miles. My local dealers service manager has never heard of it. Have you any knowledge of it, its performance or its honesty in the claims made?
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Replying to: dandyone (Jul 09, 2008 2:41 pm) "I looked into it (which you could have done, making me suspicious of your question), and it looks like it was originated by a former Nasa employee, not by Nasa. Hard to judge the honesty of claims, at least the discriptions weren't out in left field. No third-party test results were easily viewed, further raising my concern, but I don't know. I'd be surprised if any kind of treatment could increase mileage that much - of course, you said 'by up to 20%", which means from 0-20%. Gotta watch that 'up to'."
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Replying to: dandyone (Jul 09, 2008 2:41 pm) |
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Replying to: texases (Jul 09, 2008 3:00 pm) He closed the question. Wonder if he is on commission. 
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I posted the original inquiry in good faith that you people would give an honest opinion. Only one gave a straight answer and I really appreciate that, the rest of the posts were laced with smart ass sarcasum. And you wonder why I closed the question.
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