Toyota moved to the 0w-20 recently for most of their vehicles and extended the range to 10k miles.
I am using Mobil 1 0w-20 here in USA b/c most auto stores sell 5 quarts and a Mobil 1 oil filter for $29.99 + tax which is cheaper than a dealership synthetic change by far.
I haven't read anything bad on the Penz Plat and would probably use it in my vehicle if given the chance.
I also was going to try the
www.eneos.us 0w-20 japanese oil next.
However It's going to take me 8-9 months to hit 10k miles.
All that said there is nothing wrong with using the dino oil 5w-20 every 5k miles. You'll just suffer some very small percentage of mileage like 0.5 or 1%.
I like the synthetic b/c of the constant start-stop the TCH engine goes through.
-Mike