Technology of Clean

Why Pennzoil Motor Oil?


Your car means a lot to you. It’s part of your life, it’s part of your family. So you want to keep your car’s engine as close to factory clean as possible. By putting Pennzoil® motor oil with Active Cleansing Agents in your engine, you can be sure that you’re doing the very best you can for your car. And you’ll drive with confidence and experience the feeling that comes with a clean engine. 

The Technology of Clean

Why is clean so important in today’s engines? Engines are born clean at the factory. In fact, if you were to visit the engine-assembly facilities of state-of-the-art engine builders like Ferrari, you’d find that they more closely resemble semiconductor clean rooms. That’s because the tolerances in today’s engines are tighter than ever, and today’s engine builders know that clean is crucial.

Exclusive video at the Ferrari Factory

Dirt happens

The problem is, even pristine engines don’t stay pristine for long. Every time you turn your engine on, it continuously generates acids, combustion gases, water vapor and fuel by-products that end up in your oil—your engine’s bloodstream. Unchecked, these contaminants may eventually form deposits that can clog oil passages, gum up moving parts and, ultimately, reduce engine responsiveness. Tighter tolerances = less tolerance for dirt and deposits.

What Happens In Your Engine

For every 100 gallons of gasoline burned in an engine, these by-products are produced:

  • 90-120 gallons of water.
  • 3-10 gallons of unburned gasoline.
  • ½-2 pounds of soot and carbon.
  • ¼-1 pound of varnish.
  • 1-4 pounds of sulphuric and nitric acid.

A measurable percentage of these by-products end up in the crankcase oil, potentially contaminating the oil. When dispersed properly in oil, the filter can trap the larger particles. Contaminants too small to be filtered are removed with the engine oil change.

How motor oil sludge forms.

If the oil does not disperse contaminants properly into the oil, or if the oil does not get changed, the suspended particles begin to settle out of the oil, forming sludge and damaging deposits, as in this valve deck.