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I am switching my 2002 Silverado over to Amsoil TSO 0W-30 from Mobil 1 0W-30 at my next oil change and I was wondering what people think of me running this oil for 2 OLM intervals. My plan was to change my AC Delco UPF44 filter after 1 OLM interval, top off with more TSO, then do the full oil...

It is interesting to see the dismantled view of the EaO64 filter on the Amsoil website and compare it to the dismantled view of the Champion-made AC Delco UPF44. They almost appear identical in the way that they are constructed and the materials used; white synthetic media with the mesh backing...

I was wondering if anybody else noticed that the Amsoil EaO64 filter seems to have a relief valve located in the bottom of the filter. My Trailblazer has the relief valve located on the block and ever other filter I have used on my GM engines are smooth in the bottom of the filter. Any ideas? I...