Oil Service once a year is cheap insurance for a $ 30,000 engine. They're not very hard to do - if you want to save some cash you can DIY for about $ 100 or so. Have to pull the front belly pan but its not real hard to do.

 

I just did and oil change on a 2013 Vantage V8. Easy, three plugs, filter and no need to drop the belly pan. AM has an access hole in there to remove the dry sump magnetic plug. BTW, it was the initial 1000 mile change and there was plenty of junk and assembly lube in the oil.

Mark