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Message: <blockquote data-quote="Bandit1047" data-source="post: 14893" data-attributes="member: 1222"><p>Here is the number one reason you should use Synthetic oil if your engine has a turbo: The bearing in a turbo is a floating bearing that floats on a layer of oil. This oil is fed from the oil pump though the oil filter and into the bearing. When you shut down the engine, the heat from the exhaust side migrates through the entire turbo housing raising the temperature. The flow of oil is also stopped and a drop or two of oil remains at the orriffice (opening that the oil flows through). Crude base oil burns or Cokes from the heat. Eventualy this coking builds up around the orriffice and stpos the flow of oil, leading to turbo seize and a$3,000. repair bill. Synthetic oil does not coke due to it's high temp resistance to coking or burning. WARNING; you must use a synthetic oil that is blended for diesel engines. NOT ALL synthetics are diesel compliant! If you prefer to use a crude base oil, you can install an engine "Pre Luber". This is a pump that starts after you shut the engine down and continues oil flow to your turbo until it cools down. You can also use it to aviod dry starts. This pump will build 50 lbs. of oil pressure and if your equipment sits for long periods it is a great way to increase the life of your engine. Anyone have a comment on dry starting engines?????</p></blockquote><p></p>