Carbon Buildup..

[joec]

I have good results with WURTH and Ford R16. WURTH comes with long plastic tube that you can get very close to the inlet valves in some engines.

What about the air inlet?

Any picture or diagram to show where exactly to spray?

[break]

Subaru upper engine cleaner is the same as Ford Motorcraft R16, both made by Bars Leaks. Ford will be cheaper and if you could get Amsoil PowerFoam you get more product for less.

Cheers mate! I've been using the Subaru stuff for years and just wanted your input on if there was a better product out there to use. Sounds like sticking with the Subaru stuff is fine.