I have seen an interesting study on oil filters. The comparison of all commercially available
filters were used with interesting results. The high end of oil filters was those available from
Amsoil.They were superior in filtration capability but they came at a price. Of all the available
filters on the market, Fram and Wicks tested the worst with poor materials and common failure of
parts, like bypass valves. Interesting enough I got the data from a rotary enthusiast off of his
web site. It showed for the money that AC-Delco rated highest in materials and quality for the
money of most availabe filters. Mazda uses superior filters as well but that is usually a dealer
item and will generally pay as much as an amsoil filter. The remote set ups that we use lend
themselves to easy amsoil adaptability. I am partial to the lubricants that they produce but I was
not involved in the study. I am just the messenger.
Doug Mueller
RX-6 13BT
Henderson,NV

 
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