[Jamie '92 968]

Looking back over my service records I noticed that whenever I had my car tuned up at the dealer, they billed me for something labeled "ZVW-239-003 ADDITIV", quantity 1 fromone dealer, quantity 2 from another. About $4 each.
Since I'm never going back to the dealer again, can somebody tell me what this is, and if/when I should be using it?
My best guess is that it may be a fuel injector cleaner, but there is nothing in the maintenance schedule that seems to match.

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[PorscheDude]

It is a fuel additive said to reduce and prevent carbon build up.

http://audi.bernardiparts.com/Products/Aud...VW-239-003.aspx

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[gryphon]

It is also a fuel additive said to increase the dealer's profits.

Tom

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