Using Subaru Carbon Clean on my 2015 Forester XT

In this video I talk about and show how I used Subaru Carbon Clean on my 2015 Forester FXT. I'm going to use this as preventative maintenance going forward, adding it at each oil change to help prevent carbon buildup on my intake valves.

Subaru Part Numbers:

Carbon Clean: SOA868V9165
Top Engine Cleaning Tool: SOA868V9430
Top Engine Cleaner: SOA868V9160 (for reference. I have never used this product.)

Some additional notes I didn't talk about in the video: I left the application tool screwed into the empty bottle for a few hours and when I took it out, the liquid had corroded some of the chrome off the inlet tube! Don't let this stuff drip onto anything like the paint of your car.

Update: The day after doing this treatment, driving to work and idling (in gear) at traffic lights seems to have smoothed out. When I first got the car, idle was butter smooth but as time went by, it got slightly rough. (Really only a slight change.) I need more seat time to know for sure, but so far today, idle felt butter smooth again.

Also, someone claimed that the FA20DIT has a dual injection setup, where there are injectors on the intake manifold as well which cleans the valves. This is wrong. The non turbo variant of this engine like in the BRZ uses this dual setup but the turbo engine on this generation of vehicles only has the high pressure injectors. See here for images from the service manual for information on how the Turbo engine is setup: https://imgur.com/a/nrJsI