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Yep, there's two engines in the Gen 4 and one takes 0W-20 and the other 0W-16. My wife's 2017 (model ZVW50L-AHXEBA) takes the 0W-20 and my 2021...
Not at all...our modern engines are designed to work well with lighter oil. If you are still skeptical, watch this scientific lab test....results...