Engine oil is critical to the proper function of the internal combustion engine. Calling oil the life blood of the engine is fairly accurate. When oil or oil pressure is lost the engine will be damaged, and damaged quickly if it is working under load. Oil seems like something that is pretty simple and in many ways it is, but so many different types exist, and with recent advances in engine technology and lubrication technology many of the rules have changed. Of all things associated with the automobile there are perhaps more myths surrounding motor oil than anything else. One of the biggest myths is the ‘change your oil every 3000 miles myth, more on this later.
These synthetics hold up well over the long term and do not suffer from thermal breakdown and oxidization as much or as quickly as conventional motor oils. This means that synthetic oil will last much longer. How long? Some synthetic oil manufacturers claim that their oil will go 25,000 miles before it loses its ability to lubricate. This may be true because synthetic oil is very effective, but the best rule of thumb is to go with the recommendations of the manufacturer regarding oil change intervals and oil type specifications. Synthetic oil does cost more than conventional oil but this cost is usually off-set by the fact that you don’t have to change it as often. Most oil manufacturers also sell synthetic blends which are a mix of synthetic and conventional oils, to provide some of the benefits of synthetics but at a lower cost.