As for accessing the oil filter, I'm not sure since I've never looked underneath the hood of a RR-SS. As for the oil drain plug seal, I do it every other time, just to be safe. Lastly, the syntetic oil is probably the best type of oil you can go with for that type of vehicle, as for what oil you plan on using, thats completely up to you. I go with Valvoline Full-Sync 10-30.
Hope this helps. Good luck and keep on Rovin.
I've done it before, but for my 04 RR-HSE and this is what I did to reset it. Try it out and follow these steps. It might be the same steps for the RR-SS.
1- With the Ignition being "off", press down the LH (trip) odometer button and hold it, and turn the ignition key to the first position.
2- Continue to hold press down the LH (trip) odometer button for apprx 5 seconds until one of the following words appears in the display: "Oil Service", or "Inspection" with "reset".
3- Release button and press again until reset SIA begins to flash.
4- While the display is flashing, press the left button briefly to reset the sevice interval.
5- After the display has shown the new interval, the following will appear: "END SIA".
Try it out. If you do it correctly, your mileage for your trip odometer will start counting down backwards from a set interval of miles, and thats how your computer will make you aware when the next oil change is do. Hope it helps out