the reason your navigation is not accurate is because it may be a year behind even though is a 13 model the nav disc was a 12 so you have to update it every year and its always a yr behind so the latest will be a 2013 call your local dealer here in tx it cost about $169 if its the disc style...
you can got to 10,000 miles if you use full synthetic 0w20 but they did not start using that until 2011 so I would still recommend you to use 5w20 I work for Toyota and that's what we use