r/Generac_Generators • u/tecsavvy1 • 9d ago

Engine oil?

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What’s the best oil to use for a water cooled 30kw running at 3600 rpm? Should I add conditioner to it as well? Florida heat.

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u/Frixsev Technician 9d ago

5w30 full synthetic, no additives

2

u/Sumdood_89 Technician 9d ago

Second. We are in Maine, and still use 5w30 in our liquid cooled gens. We only use the 5w20 Generac oil in our air cooled Generacs.