Posted by spencer13cat on August 12, 2008 at 20:10:45 from (68.91.212.97):
In Reply to: Synthetic motor oil posted by rustyfarmall on August 12, 2008 at 07:19:38:
Picking a brand is not nearly as important oil cleanliness. I won't get into the highly subjective issue of horse power and mileage gains. If you are looking at engine and component longevity there are a couple of things you should consider.
1) Prefilter your oil before putting it into the machine. The easiest way to do this is adding a filter manifold to your oil pump. Virtually everyone believes that oil out of the package is clean. There endless tests done by the Fluid Power Society (I am Fluid Power Certified and work for a Hydraulic componet manufacturer), SAE, and other testing agencies showing the difference in cleanliness before and after.
2) Oil filters. Again, there are numerous studies, and in the case of filters everyone is judged on the same set of rules. The best way to be sure your filter is working properly is to install a filter manifold with a gauge. As the filter clogs with dirt it causes a slight pressure drop. The drop in pressure is clearly shown on the gauge. Most gauges have a green and red area so that you don't have to remember by-pass pressure on the filter. When it goes red your filter is no longer filtering. The attached link is very good. It isn't all technical and I think the average guy will understand the points. It is regarding motorcycles but no matter. http://www.calsci.com/motorcycleinfo/Filters.html#OilFilters
If you look in a hydraulic filter catalog you will see the different filter media, and micron rating. Newer hydraulic components require specific oil cleanliness because the clearance of the parts are sometimes a few thousanths. For engine oil filters you will see in the article that Purolator Pure one is the best filter you can buy assuming you can find one that fits.
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