I have a 2010 VW Jetta TDI Sportwagen. Why should I use Sea Foam in the fuel or the oil? [

Thanks for the question, George! The biggest benefit of Sea Foam in the fuel and oil is that it will help clean up fuel and oil deposits, and resolve the problems caused by them (which can include rough idle, loss of power, oil burning, and lost fuel efficiency). A cleaner engine runs better and lasts longer. Sea Foam is just an easy way to keep your engine running as clean and strong as possible and help it last longer without problems.

In fuel, it works through fuel injectors to remove harmful residues and deposits from fuel passageways, intake valves, pistons, and chamber areas.

In oil, it cleans harmful residues and deposits that can restrict oil flow and engine lubrication.

Hope that helps and let me know if there’s anything else!