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Regarding a 2002 F-350 7.3L Powerstroke with a Bypass Oil Filter and Amsoil Diesel Motor Oil. Is their 15W-40 Heavy-Duty Diesel and Marine Oil still the best oil to run for long OCIs? Have been using the Diesel and Marine Oil with great success but see that they have some new 15W-40 out and...

I don't know if this has been posted before, but it seems no one can answer this question for me. What happens if you add both a demulsifier and an emulsifier to the same tank of diesel? TIA.

Hey fellas, what do you think about this product? http://www.opti-lube.com/oilf.htm TIA

Please, need some help here. Your thoughts on this terrible UOA would be appreciated. TIA. http://i196.photobucket.com/albums/aa37/yankem1/scan0001.jpg

If a good single bypass filter filters out all the harmful wear metals (in addition to other contminantes) and you sent off your oil for UOA, then how do you know what your wear metals actually are?