gat821

Some of those products that do go through the intake path sound promising. Do you have any experience with any of these products/services by any chance? Or those your dealer would recommend?

billypete

No personal experience here, just what Im told.
click this link for a seeming endless amout of information regarding this topic:
http://www.audizine.com/forum/showth...-up-Megathread

cheers

js from nc

No...I'm not kidding. I'm sorry, but I have a problem with the notion that for the majority of my fill ups, I need to drive 30 minutes round trip out of my way, passing dozens of gas stations in the process. And I travel out of town quite a bit and rarely cross paths with TT stations. So thanks for the condescending "advice."

UrbanExtant

Every car has its own needs, and its own quirks. One of Audi's is that it calls for high octane, top tier gasoline. They don't hide this information before purchase in an effort to dupe and trap the consumer, in fact, they post it in many different places. While one can use non top tier gasoline, they do so at their own risk. Audi calls for top tier gasoline because it is those brands that consistently keep high levels of detergents and additives in their gasolines, whereas other brands generally do not. These additives and detergents are what help prevent carbon buildup, and help keep the engine performing at its best. Audi simply calls for the best gas for their engines in an effort to keep them performing at their peak for the longest amount of time possible. It's your car, and your money, so make the choice that's right for you, but getting angry at Audi for giving you advice on how to do what's best for your car is misguided, especially when this information was easily found before purchase and delivery of the vehicle.

By the way, I do just what you are angry, about and I drive out of my way to go to the shell nearest me. I pass six other gas stations on the way, but I do so happily knowing I'm doing what's best for my car.

steveracer

I use the top tier fuel.

This will not stop deposits on the valves...the fuel never hits the ports or valves - it has no effect.

I wonder why the nav system shows the cheap fuel stops and doesn't filter out those to show where the top tier fuel stops are. I find that awful strange.

Epicurus88

If it doesn't help with the carbon build up, why do you use top tier fuel?

steveracer

Audi recommend it. It is in the owners manual. I use the same logic as with the motor oil 502. I could use Sears Spectrum oil, but I use Mobil 1 because Audi recommend it and I know it works.

Detergents for the injectors perhaps?

HaveBullDogWillTravel

Uh...I don't recall offering any advice but YW anyway.

gat821

Maybe use the additive that billypete linked to a few posts down? 10-15 mins out of my way, no biggie. 30 mins - I think i'd get tired of that pretty quickly. Unless it's on some hilly, winding road maybe

FWIW, I didn't know of the top tier gas recommendation until I read the manual. Luckily have some Shell stations near work and home.

js from nc

I agree; using an additive makes the most sense at this point given the scarcity of TTs in my region. For the record, I never received any type of "supplemental brochure" as mentioned in other posts. Nor did I ask to borrow the manual prior to purchase, let alone read through several hundred pages before stumbling onto the topic. And most assuredly, no one at my dealership indicated there would be a problem with carbon buildup that would impact performance and be be expensive to correct.