Is Carbon Build Up a problem? - Page 3 - Chevy Impala Forums
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post #31 of (permalink) Old 4 Weeks Ago Thread Starter
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Originally Posted by jtrosky View Post
Here is a brand new article just posted by Car and Driver on this very subject (high vs. low octane gas):

https://www.caranddriver.com/reviews...dodge-charger/

They test different fuel octane levels in four different cars. Power in every car increased with higher octane fuel - anywhere from 8hp to 20hp depending on the car.

But again, whether or not this extra performance is worth the extra cost of the higher octane gas is a decision that only you can make. Also, just becuase the car is creating more HP on the dyno, doesn't always translate into better 0-60 numbers either (as shown in the article) - there are many other aspects that play into that.

I guess this article illustrates that any advantage of higher octane fuel really depends on the specific engine/car - and how it's tuned from the factory.

For me, especially since I don't put that many miles on my cars anymore, I like to use premium. The extra costs is not going to break the bank and I like knowing that I'm getting the most performance I can from the engine. Also, at least with the way GM tunes their cars (where it starts wtih the high timing tables and reduces the timing when it sees knock), I would think that less overall knock would be better for the engine - so I'd like to avoid as much knock as possilbe. Even though the engine computer quickly reduces timing to stop the knock, that initial knock still happens.
so any thoughts on the carbon build up?
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post #32 of (permalink) Old 4 Weeks Ago
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Originally Posted by VladThe View Post
Am I the only one waiting on opinions about the original question? It seems we finally got it clear that Top Tier means a higher quality/level of detergents to fight carbon build up. But like the original poster jayawest, I am curious if that is considered enough or are there recommendations on type and frequency of additional carbon buildup cleaners?



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My personal opinion is that you need not worry about it unless you have issues that are the result of carbon deposits. Personally, I believe that using high-quality, full-synthetic oil along with oil change intervals of 5k miles or less is all you really need. I do also recommend TopTier fuel and using some Techron-based fuel system cleaner every once in a while as well (may not help with carbon deposits on the intake valves, but it will help keep other areas of the fuel system clean).

If you have any significant amount of carbon buildup to the point where it actually causing issues with the way that the car runs, then i'd get it fixed at that point. From what I've seen from other members of this forum and my own 2012 Impala, issues related to carbon build-up are pretty rare, even though the 2012+ V6's are direct-injected. Absolute worst case, you pay to have the intake valves cleaned with walnut shells - but like I said, I haven't seen anyone else on this froum need to do that. If you do, I'm guessing it wouldn't be needed until 200k+ miles.

Just my opinions though!
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post #33 of (permalink) Old 4 Weeks Ago Thread Starter
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Quote:
Originally Posted by jtrosky View Post
Quote:
Originally Posted by VladThe View Post
Am I the only one waiting on opinions about the original question? It seems we finally got it clear that Top Tier means a higher quality/level of detergents to fight carbon build up. But like the original poster jayawest, I am curious if that is considered enough or are there recommendations on type and frequency of additional carbon buildup cleaners?



Thanks
My personal opinion is that you need not worry about it unless you have issues that are the result of carbon deposits. Personally, I believe that using high-quality, full-synthetic oil along with oil change intervals of 5k miles or less is all you really need. I do also recommend TopTier fuel and using some Techron-based fuel system cleaner every once in a while as well (may not help with carbon deposits on the intake valves, but it will help keep other areas of the fuel system clean).

If you have any significant amount of carbon buildup to the point where it actually causing issues with the way that the car runs, then i'd get it fixed at that point. From what I've seen from other members of this forum and my own 2012 Impala, issues related to carbon build-up are pretty rare, even though the 2012+ V6's are direct-injected. Absolute worst case, you pay to have the intake valves cleaned with walnut shells - but like I said, I haven't seen anyone else on this froum need to do that. If you do, I'm guessing it wouldn't be needed until 200k+ miles.

Just my opinions though!
Thanks for your POV on this issue.
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post #34 of (permalink) Old 4 Weeks Ago
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I have also read one or two good things about Techron based fuel treatments. It is nice to hear additional confirmation as I am wary of random internet advice unless there is a fair amount of agreement and confirmation.
Although I can't understand why anyone would be wary of random advice on the highly reliable interwebz community <sarcasm>.

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post #35 of (permalink) Old 2 Days Ago
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Just had this service performed on my 2016 2LT with the V6 The vehicle only had 49189,
The write up states it is a four part cleaning system.
1. Fuel Injector Flush.
2. Engine Valve Decarbon
3. Clean Engine Valves.
4. Clean Fuel Rail.
The Dealership I went to states on the write up Next Due 75000-8000

Total cost was $154.45

Seems to me like an awful lot of maintenance for IMO low mileage car! Not accounting for the regular maintenance intervals for Oil, Tire Rotations and whatever else comes up. But then again I'm pretty particular about Maintaining my vehicle!

Last edited by Dougie; 2 Days Ago at 12:17 AM.
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post #36 of (permalink) Old 2 Days Ago
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here is a list of top tier fuels:
http://www.toptiergas.com/
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post #37 of (permalink) Old 2 Days Ago
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Dougie, were you experiencing any problems with rough running, or just having it done as a precaution?
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I have an '11 Terrain with the 3.0l V6; little brother to the 3.6l. At 155k it did start to run a little rough. The usual plugs, filter and PCV cleaning didn't do much to smooth it out. So I tried CRC GDI IVDģ Intake Valve & Turbo Cleaner. I'm not quite sure what it did, but the vehicle runs as good as the day I got it. The idle smoothed out and it does have better throttle response. I don't know how much carbon is removed from the valves; if any.

Here is cylinder #1 pre-cleaning:



This is post-cleaning:

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It was starting to idle rough, it would idle smooth then it would cough, I call it a cough, then it would be fine, the MPG's never did suffer though.
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And did the induction cleaning service help those issues?
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post #41 of (permalink) Old 4 Hours Ago
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Yes, it smoothed out the idle, it does seem to have more horsepower as well.
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