Was reading in the owners manual and it states change engine oil as indicated by the Message center. Using full synthetic should you follow this to maybe a percentage indicated in the oil life 30% maybe. Or do you do it every 3000 miles or 5000km. The 6.2L states 7500 miles or 12000km or 6 months

 

Full synthetic I'd change it every 5k miles. I don't trust those computers to tell me when to change my oil. Not after all the horror stories of sludging issues from my two neighbors. One is an Audi tech the other a Volvo tech. If you don't plan on keeping the vehicle past 3-5 years then by all means change it every 7500 miles like the computer wants you to. If you tow/haul a lot I'd change it even more frequently.