3aresExplorerJan 14, 2017oil gradesMy new 2016 Ford Power Stroke F 250 diesel recommends oil 5w-40 syn. oil for towing. I’ve been using 15w-40 Shell Rotella. What oil have you been using?
Dave_H_MExplorer IIJan 15, 2017:h What is wrong with the mfg recommendation?That is good enough for my tow vehicle.I cannot be convinced anymore that thicker is better.