Santro Club GV, Model 2005. Mileage 255,000, No engine work done so for. Just ring and valve changed 2 years back.
Engine start knocking on patrol. done tuning many times from 3s workshop also from road side mechanic, but knocking appears after a few hundred kms. Used high octane on mechanic's advice but during high octain use, no knocking but when refuelled with super again, that knocking appears as soon as car done some 100 or 200 kms.
mostly knocking appears in 2nd, 3rd and 4th gears in low rpm.
it sounds like ترڑ ترڑ ترڑ ترڑ ترڑ ترڑ ترڑ ترڑ
What would be the remedy for this to permanently solve this knocking problem?