I bought my Wife an 08 Audi A6 3.2, I heard people talking a lot about carbon build up in these cars and just wanted to see if its okay to use Seafoam in the intake system and/or in the fuel system?? And is it recommended or should I just stay away from it? Thank you much....

 

Some people say seafoam is magical! they claim the car idles is smoother and they picked up 2 to 3 MPG on the way.

i have used it in my fuel and crankcase but not intake. havent really noticed any difference when i did it.

but it is not recommended by audi to use it. audi uses a additive called Zmax.

its probably not going to harm your car by doing so just dont leave the seafoam in the intake for too long it can eat up the gaskets. and change your oil after the treatment.

 

Fuel system additives will not help the carbon build up since the fuel does not reach where the problem is located on the intake valves. For it to do any good you have to inject it into the air intake.

Having said that, I have no idea if it would help. But here is a data point. If it worked people would be using it rather than bringing the car for a $900 carbon cleaning and there would be testimonials all over these sites. I have yet to to see anyone on the Audi sites say that they successfully cleaned carbon deposits with Seafoam.

 

I guess I will try Seafoam in the intake and give some feedback on it.

 

to put in intake ... you may get CEL & sparkplugs change.

 

Go for it and let us know if it made any difference.

I hear alot buzz about it but find it hard to believe that a quick exposure will remove carbon built up over months or years.

 

ManyAudis is right, because our cars are direct injected if added to the fuel tank the intake valves will never benefit from the seafoam. I did this through the intake and the car ran rough shortly after for a very short period of time. I let the seafoam sit for 5mins per the instructions, I then went on the high way and fully opened up the throttle. There was lots of thick black smoke so better time this towards sunset. I did feel some minor improvement overall. However, I think this process does not fully clean heavy build up given the nature of the process. Here is more details on this, check out my video on this post.
http://forums.audiworld.com/showthre...hlight=seafoam

 

Given its a 2008 you wont have much build up and seafoam really only gets ride of the larger loose stuff in your intake and exhaust manifolds from my experience. Anything caked to the head or cylinder walls still stays there.

Most people agree that the black smoke people see out the tailpipe is the actual seafoam product burning up and going out the back. One thing to keep in mind is if you do a little research many people have experienced issues with their Catalytic converters after using this product.

I personally haven't had direct experience with it so I'm weary about telling you to go either way but I can tell you no product will ever replace a good tear down and cleaning. A 2008 I would almost guarantee doesn't need a cleaning.

My advice would be leave it as is, use good quality oil and filter and change them both regularly and before due date. Also keep an eye on your air filter and avoid those K&N jokes.