When I picked up my 2020 RTL last Friday, was told that the first service recommended by dealer is 600 miles. I immediately questioned the salesman as to why since owners manual clearly states 3000 miles. His response is "that is what we recommend". Is there an actual service to be performed at the 600 mile interval? I wish to keep my ryde in the best running condition and plan to do most services myself, following all requirements to keep warranty intact. Any information is appreciated. TIA Matthew