Stuff that's been sucked into the Throttle Body!!

[beeza]

wtf is subaru upper engine cleaner?
u mean carby/throttle body cleaner?

No,it's way better than that.You spray it into the TB and it cleans all the carbon,oil,gunk out of the TB,IM,valve's and everywhere that it contacts when it's been worked through the upper engine.Brilliant!!

Suburu's hold 6 or 7 litre's of oil,that's why they need it.Heaps of carbon and gunk to clean out.