Just like humans need water, cars need oil. Without it, your car won't be lubricated, causing deterioration inside your engine and potentially everyone's worst nightmare - a breakdown. Water vapour, unburnt fuel and gases from the combustion process can overload your engine oil and these combine to form sludge deposits on your engine. Engine sludge clogs the oil galleries and limits lubrication to moving parts inside the engine which can lead to costly repairs. Your car needs to drive 15 – 20 kilometres for the engine to fully warm up and reduce the rate of contamination. This is why we change the engine oil.