I would check with Toyota what do they mean by extreme load conditions and high speed. Then you would have a better understanding what you should do. Otherwise, we can only guess what it means.My manual states that 0W-16 is recommended but “An oil with a higher viscosity may be better suited if the vehicle is operated at high speeds, or under extreme load conditions.” Seeing how I’m traveling out to the Midwest where 80 and 85 zones are common and the vehicle will be loaded down with three adults and luggage. I’d probably be fine with 0W-16 but I’m just wondering if anyone seeing any reason not to bump up to 0W-20? It’s a Toyota A25A-FXS powered hybrid.
Price-wise, after rebates there are negligible differences. 0W-16 AFE is $12.37/jug vs 0W-20 M1EP at $9.37.
0W-16 AFE is 70-80% PAO vs 60-70% PAO for the 0W-20 M1EP, so they are both high quality.