Posted by Nedd on January 07, 2010 at 11:39:03 from (97.125.251.133):
In Reply to: Re: Engine oil posted by Don McCullough on January 07, 2010 at 08:05:07:
The viscosity standards for oils are set and oils must meet those standards. But I contend that certain oils have either more impurities in them (penzoil) or actually break down at performance peaks (valvoline in racecar)
Also noted is that I don't agree with the mention of better metals above. I agree with better machining and that oils are improving but many different metals today have way more imperfections than years ago. They are just cast or machined in a more efficient engineered manner.
Any good welder or torch user will tell you that imperfections are way more common due to recycled materials being used. My welding supplier gets me different rods when repairing old tractor cast iron vs. newer tractors.
Just my thoughts on oils vs metals. Sorry about rambling on
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