Originally Posted By: dcoyne78
Not familiar with the warranty on this car, but if its the usual 60k for powertrain. I would do another 10k interval for warranty reasons and then try 15k, then 20k on the PP and maybe try an Amsoil or Mobil 1 oil filter for the 15k or longer intervals. 20k over 4 months looks very possible with this oil/ engine combo. Very nice report!
Since this is a nissan, I would believe the maximum is 7500 miles or 6 months.
And since, he went too far, warranty is over (but seeing the results, who cares, you don't need it anyway), so I will say the same thing as Cutehumor: Go to Amsoil, you are the perfect candidate for the SSO. They made their product for customers like you.
Change oil only twice a year instead of 6 times (save a lot of time), put EaO filter and change it every other oil change (every year), you will save a bunch of money and time, and will probably gain a bit of mileage in the same time.
You have a nice engine, I like it a lot ;-p