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The heat range used in the test simulates the temperature when the vehicle is turned on and when it reaches operating temperature.
The test parameters are as accurate and finite as possible. Each test uses constant materials and parameters' meaning it is as fully and accurately repeatable as possible. Being an ASTM approved method of testing ensures global consistency.
The video will give you the best view on how each test was conducted however. Watch the video now
The ball and disc specimen is using 52100 standard steel - materials that many OEM use in their main bearing. The test uses the same materials as is found in the main parts of an engine.
The different level of vertical images is a result of small discrepancies in illumination during the image being taken. The slight variation of angle of light can highlight the vertical scars. This does not affect the wear scar and the physical measurements taken by the computer.
Optimol guarantee that all specimens used are made from the same material and manufactured in the same way and are passed through a quality assurance procedure each and every time prior to each test.
As well as measuring and plotting each oils performance on a detailed graph, the tangible evidence of an oils ability to protect is the metal wear scar it produces. Each ball and plate are measured under a microscope after the test with a measurement taken accurate to 0.001 or 1000th of a millimetre. The round wear sample is from the metal ball with the oval scar being the metal plate the ball was pressed upon.