Re: Motor oil for older engines

[amcnut@xxxxxxxxxxxxxx]

Most diesel engines I've ever seen use the standard motor oil you can buy in any parts store. 

All of our AMC engines were designed to be run on a standard grade motor oil, such as 10W-40 or 10W-30. And, if you take into consideration any improvements and formula modifications that have occurred within motor oil in the past 30+ years, today's oils are probably quite superior to what our AMCs originally left Kenosha with. 

It would probably be a good idea, however, to use the new "High-Mileage" formulations in an original AMC engine that has never been rebuilt or overhauled. The "High-Mileage" formulation includes emollients and other chemicals that are normally refined out of regular motor oils, but no one ever informed the general public that those emollients and other chemicals are what helps keep your engine seals supple and leak-free. The oil companies just recently realized that they could leave all those chemicals IN the oil, call it a "high-mileage" oil, and charge more for it!

Other than using the "high-mileage" formula, I wouldn't seek out anything else to use in an AMC engine. Modern motor oils are sufficient for anything our AMCs can do. 

Jeff Reeves
Auburn GA
79 Spirit GT
72 Javelin SST
69 Ambassador DPL


On November 6, 2004 Jay Ciampi wrote:

> I was reading a "tech Tip" in a Nash Club regional newsletter the other day
> stating that we, who own cars with pre-cat.converter engines, should use
> Diesel motor oil as it still contains ZINC for lubricating cam lobes,
> valves,etc.
> Modern engine with Cats don't need  Zinc as they use hardened parts and Zinc
> will totally ruin a Cat.  Modern gasoline engine motor oils do NOT contain
> any Zinc for that reason.
> 
> Anyone out there that confirms that we need Zinc or  can refute the
> statement that Zinc isn't  necessary?  I have never looked at a bottle/can
> of diesel motor oil to what it contains, so I have no idea if this is a
> genuine concern for older engines or not.  if your engine has been
> overhauled with modern components, Zinc would not be necessary for your
> engine lubrication.
> 
> Jay in FL.
> 
> 
> 
> 
> 
> .


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