I have a 2015 Versa Note (S-Plus, HR16DE engine) which I took to the dealership this week for its first oil change at 5000 miles. I wanted to start using synthetic motor oil so I asked that they use 5W-30 Mobile 1 but they instead used 0W-20 Mobile 1. Is this a problem? They also used a Nissan oil filter rather than the Mobile 1 filter I requested. I can't find anything in the Owner's Manual about synthetic motor oil or viscosity recommendations if one switches to synthetic oil. For others who have switched to synthetic motor oil, what viscosity do you use?