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Oil weight?

26789 Views 3 Replies 3 Participants Last post by  brentah13
New transit owner here.

I want to change the oil on my transit. The manual says 5w-30, but the fill cap says 5w-20. Which one should I trust?
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What engine? My 3.5L Ecoboost says 5-30w, both on the cap, and in the manual.
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