I have the V6 and i change my own oil and filter use Mobil 1 only, Toyota has it fixed you receive a maintenance notice light on dash near the check engine lite that try's to send you to your local Toyota Stealer Dealer's service Dept. you receive this notice at 5K then again at 10K i think i changed oil maybe five time before the 5K now i wait around two years.

There is a trick using the reset on odometer to get that stupid maintenance lite off, myself i don't trust my Toyota Dealer for anything.

Any other questions just ask you should see my under carriage and frame there is no signs of any rust, never drive it when ice or snow in on streets.