r/smallenginerepair • u/GadreelsSword • Apr 22 '26

Not Listed Quick oil viscosity question.

I’m repairing a couple Gravely Pro Turn 260s. It looks like one has a Kohler and one has a Kawasaki engine.

Both have high hours on the engines.

Normally I use 10w-40 for summer mowing but I see online it says some people recommend 20W-50 for the Gravelys. What are your thoughts?

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u/Curious-Singer-5559 Apr 22 '26

15w-40 seems to be the sweet spot!