Engine lubricating oil comes in many viscosities (weights) and a variety of base oils. While you should always follow the engine manufacturer’s recommendations for specification category (such as API CJ-4 or Caterpillar ECF-3), that still leaves a wide choice of oils across a range of prices.
One of the decisions to be made is whether to use a conventional mineral oil or upgrade to a more expensive semi-synthetic blend or fully synthetic oil.What exactly is a synthetic oil?“A fully synthetic oil is nothing more than a mineral oil that you’ve taken apart and put back together in a controlled way,” explains
