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  1. crowie

    True synthetics

    Synthetic is the term used to describe the base oils which are used to make the final product, it does not include the additives. There are many types of full synthetics but for engine oils ther are typically two. 1) is PAO ( poly alpha olephin) which is man made from small gas type molecules...
  2. crowie

    Oil vs Grease, max roller bearing speeds?

    The fact is oil is a better lubricant than grease, unfortunately oil cannot be used in all circumstances. Area in particular are poor sealing, virtical shafts,etc. NORIA have a table which lists maximum DN values for applications using grease and those for oil. DN is calclated by taking the...
  3. crowie

    Running in oils

    From what I see, there is whole load of difference when your standard passenger car is FF with synthetic compared to that when a race engine is prepared. Though many race builders I deal with have experienced slow bed in on synthetics. In the family car case, lack of load during early run in...
  4. crowie

    Running in oils

    Thanks for you comments. The reason I see that Euro OE's are using Synthetics for Factory fill is that they also have very very long service intervals and NO intermediate first servie. BMW first oil change on many models is 20000Km. No mineral product will last as 20000Km can take 2 years. You...
  5. crowie

    Significance of Lubricant Testing

    You should test the oils coming in ie new, to obtain baseline results for comparison against used oils. Used oil testing is critical in expensive and critical components. Speak to your lube supplier as to what tests should be performed to give you the information you need. As a guide test engine...
  6. crowie

    Running in oils

    Does anyone have some definitive data on the type of oil (Mineral or synthetic) should be used for running in an engine. my understanding is that mineral oil speeds up the bedding in process. Synthetics slow this down which can lead to oil consumption, but have no hard data to support. regards
  7. crowie

    CALCULATING FUEL DILUTION IN OIL?

    I,m not sure there is a specific formula, rather a calibration curve is used for each instrument used to make the measurement and is based on either the viscosity or the flash point. Typically if the flash point is below 200 deg C for diesel engines the fuel dilution would be > 2% and worth...

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