“Frankly, gentlemen, we didn’t believe Bardahi could make that difference!” Those were the opening words of the famous York research engineers when they finished testing the country’s best-known motor oil additive. For 180 days engineers put bardahl to the most exacting laboratory test.
On a delicate jewelers lathe, the researchers mounted two finely honed engine valves facing each other. By rotating one valve and pressing the two metal surfaces together, they simulated a friction condition that occurs thousands of times each minute in today’s automobile engine.
Day after day, hour after hour, tiny drops of oil—premium grade oil, low grade oil, contaminated oil, and oil samples with bardahl added—were placed between the two rubbing valves. Thousands of test runs were recorded.
The valves were cleaned and recleaned. The instruments checked…