When I didn't really know much Ollie mate my oil light was flickering for a few weeks, obviously wasn't driving the car everyday and when I checked the shells they were not to good but wasn't getting any knocking either, the Pistons had play in them aswell, and of course had blue smoke on start up out the back, this was suppose to be an engine which only did 5000 miles from a rebuild so the pervious owner said so that was it the whole lot got done again