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mikefocke · 10-23-2009, 08:50 AM

"I don't know how much winter driving you do in chicago, but you could do 15W40 if its a heavy winter car. "

The colder you drive it, the lower the "cold" viscosity number you want, not higher. So why would you want to suggest the possibility of higher?

10-23-2009, 08:50 AM	#13
mikefocke Registered User Join Date: Aug 2005 Location: Sanford NC Posts: 2,537	I don't follow your logic "I don't know how much winter driving you do in chicago, but you could do 15W40 if its a heavy winter car. " The colder you drive it, the lower the "cold" viscosity number you want, not higher. So why would you want to suggest the possibility of higher?