Originally Posted By: kschachn
Well, I have run 5W-20 in my 1MZ-FE for over 200,000 miles now, and 0W-20 in my 1NZ-FE for over 150,000. You don't think I will experience reduced longevity, do you?
Originally Posted By: addyguy
I am aware that Toyota back-spec'd this engine to run 20-weight, but personally I would never use less than a 30-weight in them.
The small Toyota 1.5 works hard, and some do have an issue with burning oil from harder revving.
I doubt that you will run into any problems at all.
I run 5W30 Mobil 1 in my 2010 Yaris but the only reason I don't switch to 0W20 is because it started with 5W30 and in my mind I want to stay with what has been in the motor.
I have nothing against 0W20, I use it in both my 2012 Honda Civic and my 2013 Hyundai Sonata. I expect both of these cars to live a long time