DotMatrix - 10/6/2016 9:23 PM
when I changed the petrol which was v-power 99 half from august and half new for some new petrol also v-power 99 but with added octane booster
(toluene based
). this made the knocking go mostly away.
I then regapped the spark plugs from 0.8mm to 0.6mm which seems to have made it go totally away. I wonder why and how this made a difference