Fuel additives and the warranty on my 2014 Volkswagon Passat [SOLVED]

My wife is concerned that using additives will void our Volkswagon warranty. For example, our VW dealer says only use Castrol full synthetic oil and top tier gas. The car is a 2014 Passat with a 1.4 liter engine. Is there anything important that I should know about using Sea Foam and warranty?

We also have a 2012 Mazda CX-9.

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Jim D.
Jim D.
4 years ago

Great question David! ┬áThere is never a warranty concern with using Sea Foam Motor Treatment. ┬áSea Foam is made from the same petroleum material as the gasoline and motor oil in your Volkswagon and Mazda. There’s nothing about it that could cause harm to a fuel system or engine components. No worries!