Originally Posted By: hate2work
Originally Posted By: skoh
Originally Posted By: Hermann
Use the 5w-20. I used 5w30 on my first oil change and mileage immediatly went down 1 to 2 MPG. Also the motor does not seem as eager to rev . Can't wait to put the watery stuff back in.
You can go to a 0W-20 for even better fuel economy & better cold start performance according to the Toyota TSB.
http://www.chrysanindustries.com/pdf/products/toyota_tsb071002.pdf
Skoh, that TSB is for model years 2006 and newer, the OP has a model year 2005. His dad, however, could use the thinner oil.
Thanks for the clarification, hate2work.
More recently, Toyota announced 0W-20 across the board:
In the July 1, 2008 Edition of Flashpoint, ILMA has announced that Toyota has officially decided to switch the recommendation on engine oil for certain vehicles from SAE 5W20 and SAE 5W30 to SAE 0W20.
ILMA reports that these changes will affect all Toyota brands, including Toyota, Scion and Lexus. The change will also appear in owner's manuals.
Please read more about this announcement here:
http://newsmanager.commpartners.com/...8-07-01/1.html