The base fluids of these Straight 80 Grade aviation lubricants are composed of pure mineral base stocks. New or repurposed engines require engine break in – this process calls for specific oils referred to as break-in oils, which actually allow for the internal engine components to break the film barrier and begin to cause wear. The small amount of wear that occurs (in less than a 25 hour period), will actually be beneficial to the engine, loosening and expelling debris and smoothing internal engine parts. Straight 80 Grade Mineral Oil intended for the break-in of 4 stroke piston aircraft engines may also be used in some antique aircraft and are USDA-approved for use some food plants where no contact with product is possible.
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