Taking a Proper Oil Sample

  1. Take the sample while the unit is running (if possible) or right after shutdown. Samples should be taken "HOT" whenever possible.
  2. ALWAYS take the sample from the same sample point. Samples taken from different sample points can affect trend patterns..
    1. A valve installed in-line before the oil filters.
    2. The dipstick when using the sample pump and PVC tubing.
    3. The drain plug or sump. (Note: when taking a sample from the drain plug, it is best to allow oil to flow for a few seconds to allow any contaminates to pass through.)
    4. Cold samples should be taken by drawing equal amounts from top, middle, and bottom of component.
  4. Be sure to keep any dirt, rust water, etc., from accidentally contaminating the sample bottle.
  5. Sample at regular intervals to allow a good history to develop. Each unit is unique, and will develop its own wear trends.
  6. NEVER sample a unit immediately after an oil change or large oil addition.
  7. When taking dipstick samples, take the sample from the middle of the sump or reservoir.
  8. Send samples of all new oils being used to form a baseline for comparison to the used oil.
  9. Labels should be filled out as completely as possible.
  10. Samples should be sent in for analysis as soon as possible.