The tests were carried out on polished copper blanks that were submerged, for 3 hours at
100 degrees C, in oil treated with 15% of BestLine's Universal Premium Full Synthetic Engine
Treatment and a number of its blended by-products. The blanks were then withdrawn, washed in
Stoddard's solvent and the colors of the blanks were compared with a standard chart. The results
of the tests consistently revealed 1-A, meaning "No Corrosion".