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It honestly shouldn't do any damage. It would be best to stick with what the factory recommends. Personally, I don't like to use something as thin as 5w-20....but I guess the factory should know what the engine will run best on. I wouldn't worry too much about it unless they try to get you to run 20w-50 or something really ridiculous like that.

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13y ago
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Q: What harm does it do to always use 5w20 then oil change people switch to 5w30?
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