I took a little bit of time to read up on GC today and it looks like good stuff but I've grown up on old school oil ways (10w40 summer, 10w30 winter, go up viscosity on an old motor, etc). My dad scoffed at the idea when I put the recommended 5w30 (I used plain old Castrol) in it for the last oil change in the tow van, "That's way too light!". (IMG:
http://www.frrax.com/rrforum/style_emoticons/default/biggrin.gif)
Would GC work well in a tow rig (Ford 4.6L E-150)? Everything I've read points that it should be fine, but I figure asking the gurus can't hurt.