0w-30 good/

toyota said i should put in 5w-30? is 0w-30 good too?
I was put in Mobil 1 0w-30 or Amsoil 0w-30?

if i put in amsoil 0w-30, would i have a longer interval oil change?
better gas mileage?

so many questions...

 

i used the 0-30 for and oil change for about 4000 miles gas mileage staid the same. i used the mobile 1. i just switched back to m1 5-30 this past oil change. with any synthetic 5k miles is a good number. the oil might still be good but is going to be dirty no matter what oil it is and the filter needs to be changed anyway.

 

i guess I'll stay with 5w-30 then... Mobil1

 

are you above the artic circle?