Oil

Every car out there has its recommended oil weight by the manufacturer. The grade of the oil can make a difference in how the engine runs. If the oil is too thin then it may cause the valves to work harder to give the same amount of power. The valves may move faster but there is no engine response which can cause lagging.  In addition if the oil is too thick then your engine may have a difficult time moving the valves. Having the proper grade oil may change the way your engine performs and ensuring its longevity. Not only does a car need its proper oil grade, it needs to have it oil filter replaced constantly and consistently. The oil filters trap the particles that may harm the engine.  The precise oil-grade your car needs depends on its mileage, altitude, temperatures, the ways its driven, the engines condition, and the cleanliness of interior components. If the engine is not clean it can lead to engine failure, sludge will begin to form and prevent the engine from working properly. My cars recommended oil grade is "5-30", given the condition the engine is it may reach its peak performance with let's say a "10-30". The "10-30" may be a little thicker but it is recommended for my car because it is an older-mileage car. Having the oil changed regularly will prolong the longevity of the engines life.