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Rotella Oil

Discussion in 'Under the Hood' started by 03 exploder, July 12, 2011.

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    1. 03 exploder

      03 exploder New Member

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      '03 XLT
      I know this oil is intended for diesel engines, but is it safe to use for my gasoline engines? Oil is oil right ;)
       
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    3. n2epv

      n2epv Active Member

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      There is a school of thought that Rotella of the proper viscosity grade is actually better for your engine than 'gasoline engine' certified oil. Seems the oil companies quietly removed an additive called ZZDP from all but Rotella (actually all diesel lube oil as well as 'Racing' motor oil still have it). ZZDP is a zinc compound that helps protect engine parts from damage by friction.

      The issue with ZZDP is that it can kill catalytic converters, creating an added expense for the auto companies as they normally warrant your converters for a lot more miles than your engine . This ZZDP additive seems to be most important if you have high-friction engine components - like turbochargers or flat tappet lifters. Modern engines all use roller tappets, but the web sites covering classic cars talk about using ZZDP a lot.

      I haven't tried Rotella in any of my cars yet, but even my '94 Lincoln has a 4.6 (with roller tappets), so maybe I won't. It does have me wondering if I could have saved the flat lifters from destroying themselves in my 4.0 Jeep, though. I hadn't heard of this back when I was driving the Jeep.
       

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