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what could this be? noticed recently in coldish weather. If you press loud peddle slightly not enough to get engine revving just slightly in there is a tappy noise? what is this?
That in cold weather would cause you to hear the tappets, its advisable to run a 5 or more rated oil really, 0 rated are for extreme cold weather conditons where the oil needs to heat up quicker, if not then you may need your tappets adjusting (depending on what sort of mileage you have on your car).