Just wanted to introduce myself to the forum. Just bought a new to me but used 1997 Goldwing GL1500 Aspencade with 54000 miles. Everything appears to be working properly except that the rear brake appears to have a lot of free-play on the pedal so I assume that it will be in need of some new brake pads because I do not see any adjustment. It is also in need of an oil and filter change. What is a good recommended oil to use, synthetic or not?