Recently I bought a car and when I was inspecting my car I opened the oil cap, I saw rockers are darkish black maybe there is a lots of carbon or sludge present inside. So I did a little research and ends up with engine flush.
What I was planning to use is HOME MADE ENGNINE FLUSH which consist of Diesel, Kerosene and Engine oil in desired quantity and ratio.
@Xulfiqar bhai plz help.
Some more details:
Engine is Suzuki F8B running on Petrol no CNG at all.
Spark plugs threads are covered with 5mm rings (locally said choori lagi hoi hai). Oil issue maybe.
But engine is noise less and running smoothly.