5w-20 : how many using for TOYOTA 1.5 ltr. engine

[smokey1]

in their YARIS , PRIUS , SCION XB , ECHO , or older 1.5 ltr. motors from TOYOTA ? If so . Any increase in mileage ? More responsive during acceleration from a stop or climbing hills ? Is it conventional or synthetic and what manufacturer ? Any negative results ? Such as engine noise , etc.. Just curious . THANKS

 

[ekpolk]

I have specifically stayed away from an xw-20 oil in our Prius, which as you know, has the 1.5L 1NZ-FXE version of the 1.5L. My reason is that Prius-specific TSB which says 5w-30 only. I do wish they'd offered some explanation why they went to such trouble to rule out 20 wt for the Prius. Tantalizing that they did not for the other 1NZ powered cars.

 

[Spykem4e]

On my gfriend's echo, we use 5w30 and change the oil at every 10k kms. I use Mobil 2000 5w30... hmm or was it Mobil 1000. I dont remember exactly. Since we dont take the echo very often because she has another car I cant remember exactly which one was it.