If you were about to leave for a 1500 mile round trip and your oil change was due in 500 miles would you change it before or after the trip? Part of me figures long highway miles are pretty easy on oil and running that on fresh oil might be a waste... but the BITOG in me wants to get it done early... FWIW this is a f150 with 2.7l eco boost (with high oil level that smells gassy)...