Nagging problems such as finding oil drips on your driveway, having to routinely top up the engine oil and coolant, hearing annoying rattly tappets, and always having to cross your fingers and toes at the annual MOT test in the hope your car will pass the emissions often have to be lived with because the solution is time-consuming, involving an engine stripdown in some cases. There are, however, a range of additives that promise to reduce those emissions, stop a leak and quieten the tappets. Yet we don’t really know how they work and simply have to put our trust in what it says on the side of the packaging for each product. So the following questions aim to get to the bottom of it all.
OIL DRIPS
A brittle crankshaft oil seal is one of the main causes of an engine
