Recently after watching the Wheeler Dealers episode on the XK-8, I was impressed how Ed China was able to improve the overall emissions and performance of the Jag. I was wondering if anyone has done this and did you see the benefits he described? Also, the most important question, what was the cost?
Thanks

 

It looks like it is called TerraClean. There are a ton of skeptics out there, and some people are saying its only as good as Seafoam.

I wish I had done something prior to changing my spark plugs