Your fuel economy will suffer with 50 weight oil and it has no advantages with daily driving, i am not a fan of mixing oils if you dont know how the additive package will be boosted or watered down.
I would check the spec sheet first. But if you got the 50 weight alread.
Also thats not how mixing different weights works thet use different viscosity modifiers whicch may act in a way u dont expect. No it wont hurt your motor but i am not a big fan of that.


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