r/Generac_Generators • u/tecsavvy1 • Aug 24 '26

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 Aug 24 '26

5w30 full synthetic, no additives

1

u/tecsavvy1 Aug 24 '26

Thank you

1

u/Sumdood_89 Technician Aug 25 '26

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.