Had an 02 Altima 3.5SE and used castrol synthetic with a bosch filter. I only drive 5-6K a year so I change it once a year. 80% stop and go in the city. SoCal weather but might start doing some road trips. Now I have a new/used 08 Infiniti G35 Journey Sedan, a lease return with 23,600 miles. Just stay with what I've used in the Altima?