I'm not sure if you are understanding... There is no longer a mileage or time interval restriction. The time interval you are quoting is based upon the language in the pre-paid service contract stating a 12,500 mile service interval. 12,500 miles x 8 years = 100,000 miles. My email from Jerome Guillen, Senior VP of Sales & Service, states that this is no longer the case. Make your decision on whatever metric makes you the most comfortable.
Here is the email (emphasis mine):
Dear Mr. [AmpedRealtor]:
Any customer who has paid for a 4-year service plan is entitled to 4 “annual service” visits. The customer can elect to bring the car whenever they desire: we recommend every year or every 12,500 miles (whichever comes first), but the customer are free to do whatever they essentially desire. They can bring the car every 18 months or every 6 months. In the end, they will receive the 4 “annual service” they have paid for. I hope this clarifies the situation.
Many thanks for your continued support. Best regards,
Jerome Guillen | VP, WW sales and service | 45500 Fremont boulevard, Fremont CA 94538