just got home from a friends barn warming party. awesome bbq, dj, good looking gals, cold beer. i was riding the hd, so i didn't partake in the drinking part, surprise! around 50 miles each way, on the chilly side here in southeastern va today. changed the oil and filter this morn using mobil delvac 1300 15w40. bike ran awesome, i know this isn't a scientific test, but everything went well. no unusual noise, engine seemed really smooth. bike is a stage 1'd xlh 1200. yr 2000. might even use this oil in the summer months, 2000 mi, drains. i think it would compare well w/ the "360" hd dino. getting on the old side, night vision isn't what it once was, so we ran 75, 80mph the whole way home. i think i actualy lost less oil blowing out the air cleaner than i did when using valvoline synpower 20-50.