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Oil Condition Monitoring

Posts Tagged ‘Penzoil

Comparing Oil Condition to Determine Optimal Oil Change Interval

August 7, 2008

As promised, here is some additional oil condition/oil change interval information on the PT Cruiser discussed in August 6th’s posting. This chart displays the same information, but the curves are shown in a side-by-side comparison instead of the cumulative curve on the previous chart. What you see is that the oil additives depleted at approximately 450 miles for both […]

When do additives deplete? Much sooner than you’d expect.

August 6, 2008

One of the key factors in determining the condition of oil is the amount of additives, or lack thereof. As defined by NORIA, additives are a chemical substance added to a petroleum product to impart or improve certain properties. Common additives include antifoam agents, anti-wear additives, corrosion and rust inhibitors, detergents, and oxidation inhibitors, among others.  The oil condition curve pictured above is from […]