So you don't have any fix? you're happy with the car and don't want the buy back? You're the original owner, when did you buy the car?
Miles are in different of phase 1 fix, other than the value of the payout you'd get.
If you get phase 1 fix now and get the cash, then when ever you feel like it get phase 2 and get the rest of your cash.
You're leaving money on the table right now, but you're also enjoy the unmodified driving characteristics some people complain about the phase 1 fix.
Also those gaming the fixes to milk out the max extended warranties, are just that gaming. Someone would need to be putting on 30K year to really hit the possible max warranty, someone like yourself who does 13K, you'll time out on years before you hit the mileage threshold.