Looking for opinions. I have a 2011 Ford Fusion I use to make weekly long highway runs (500 mi roundtrips). My last run I went the by the OLM and changed at 22% remaining and about 7000 miles. By far the longest I've ever gone on an conventional. Is Pennzoil conventional 5w20 good for that? Car has 100K and runs perfect. The car had a steady diet of Motorcraft syn blend before I got it and is in perfect condition. I might send in for an UOA, but for the $25 it costs I'll just change the oil, so I'm looking for gut reactions. Car has very little city and no traffic/stop and go driving. Just 80mph interstate.