I will add my .02 cents worth here. Not that it matters. in my 1993 FXRS I run strictly dyno oils. The 07 EGC has always run synthetics and I have tried many different synthetics. What works best for me is Bel-Ray 15-50 It quiets the valve train and I find that the oil pressure stays higher in warm weather and if I go long on an oil change it still maintains.