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Regular dino 20W50 oil for summer, add in a zinc additive if not using something like BardPenn oil.
Do you have an owner's manual?
It's listed in there, lighter oil in winter/cool weather.
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1977 911S Targa 2.7L (CIS) Silver/Black
2012 Infiniti G37X Coupe (AWD) 3.7L Black on Black
1989 modified Scat II HP Hovercraft
George, Architect
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