Mobil1 Advanced Fuel Economy 0W-20

[zkay]

Hello

I am coming up on needing to change my oil very soon. I am contemplating buying the Mobil1 Advanced Fuel Economy 0W-20 oil for the change.

http://shop.advanceautoparts.com/1/1...rt-98jq66.html

http://www.mobiloil.com/USA-English/...Qs.aspx#FAQs25

I already get great gas mileage, but if I can squeeze a little bit more out of my car, why not?

My question is, I know 5W-20 is usable in this motor, as the dealership I bought the car from used it when they changed the oil before I bought the car. I am wondering, at what point will I have to change the oil due to outside temperature? I probably won't hit another 5000 miles before it gets cold outside (I am in N.E. Iowa).

Also, has anyone else used this oil in their Yaris, and care to comment on what advantages it's offered, if any?

Thanks for the help.

-zkay