You can change to annual servicing (still same oil though) if that works better for you. A lot of our customers prefer this so that the vehicle has a thorough service every year before trips are starting and then they know that everything is ok with the vehicle for another year.
GP T5's can go up to 25,000 miles or two years between a service. Brake fluid is due for change at 3 years first and then every 2 years after that. Pollen filter is every 2 years or 40,000 miles whichever comes first and air and fuel filters are due at 80,000 miles or 6 years.
Thanks