should I use synthetic or conventional oil and why? We drive about 6 to 7,000 miles per year, more short trips (10 miles or less) than long. Owners Manual recommends synthetic.
What more do you need , the people who wrote the manual are not guessing. If you look it also has a time period such as 1 year or 6 months .
Not to mention, since yours is brand new, all service work should be done, on time, by your dealer. This will eliminate any questions if repairs under warranty are required.
If your dealer is not doing the service, save ALL your receipts from the shop you chose to PROVE you used synthetic oil as the manual recommends. Avoid the quickie oil change places.
Even synthetic oil is cheap, new engines are expensive.