Should i use thicker or thinner oil on my 01 honda civic with 217,623 miles?

Should i use thicker or thinner oil on my 01 honda civic with 217,623 miles? - 1
Added (1). just wondering what oil weight should i use if my 01 civic is high miles.
Added (2). what oil weight or grade should i use 10/30 or 5/30 for my 01 Honda civic

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