To properly evaluate machine conditions, the oil samples submitted for analysis must be representative of the system from which they are taken.  For best results, follow these guidelines:

• The machine being sampled should be brought to normal operating temperature.  Oil should be circulated, if appropriate.  This will ensure that insoluble and semi-soluble contaminants are uniformly dispersed throughout the system.  Samples taken from machines that have been inactive for long periods of time are not representative.
• Each oil sample should always be taken in the same manner and from the same sampling point.
• Do not sample a machine immediately after an oil change or after a large amount of make-up oil has been added.
• Use a clean, dry container to draw the oil sample.  Ship samples in the plastic bottles provided in the test package kit.