Originally Posted By: djlinux64
Redline officially states 12,000 to 18,000 miles can be safely driven on their synthetic oil. I assume you can extrapolate this to other quality streetable synthetics.
Depends how they're formulated. There are Amsoil products that can go up to 25k miles, and then on the other end of the spectrum there is Motul 300V that probably shouldn't be used more than 8k at most.
But on the original topic, Mobil 1 0w-40 is definitely capable of fairly long OCIs. I'd say a Maxima could run it at least 10k miles unless it's being driven hard.