![Engine Oil](https://cole-onsiteinstaller.imgix.net/https%3A%2F%2Fwww.onsiteinstaller.com%2Fuploads%2Fimages%2Fi-08-13_machine_matters_-_synthetic_oils.jpg?crop=focalpoint&fit=crop&fp-x=0.5&fp-y=0.5&h=620&ixlib=php-1.1.0&q=75&w=1024&s=1fccda5d73f232b57dc9027beef4b439)
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...