Will Synthetic Oil Improve Mileage?

[TOLMACH]

Originally Posted by DMZ

Yes, the Yaris has a reputation as being one of the most trouble free cars available. And yes, no timing belt.

Winters in Moscow probably call for a synthetic oil?

Thanks

Winters in Moscow are relatively mild compared to my hometown in Eastern Russia )) Also, from a standpoint of winter-operation, is there a difference in mineral vs synthetic engine oil if both are rated as f.i. 5W40?

I switched to synthetic oils something like 5 years ago for all cars I had since that time .. cause I heard they keep engine clean better