For those who are new to this automatic transmission fluid (ATF), the Toyota World Standard (WS) ATF 08886-02305 is considered lifetime fill in Toyota Vios (2007 generation onward), Yaris, Prius and Prius C. It is considered lifetime fill for vehicles operated under normal driving conditions.
This Toyota ATF WS does not required drain/refill unless the vehicle is used to tow. I pulled out the Toyota Vios transmission oil dipstick and I saw the note even stated “No need to replace ATF in normal driving condition”.
Nevertheless, I still proceed to change the Toyota ATF WS 08886-02305 in my Toyota Vios that already clocked at 80,0001KM just to verify if changing the ATF will improve the car’s performance.
The 4L of ATF WS 08886-02305 cost me RM180, from Toyota dealer and I had the ATF WS changed at local vehicle service center:
The drained out oil ATF WS is slight in darker red color, while the new and fresh ATF WS 08886-02305 is red in color as above photo. Then I drove my Toyota Vios for another week; and I found the car performance and the fuel consumption rate remain the same.
Conclusion, replacing the ATF WS 08886-02305 isn’t necessary as stated in the dipstick and it doesn’t improve the car performance even we replaced it.
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