why not 10w-40 synthetic oil ??
09-05-2009, 08:32 AM
Join Date: Sep 2006
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I've never had a problem starting either of mine well down into the low 20's using 20w-50.
09-05-2009, 08:53 AM
Join Date: Jul 2007
Location: PA.
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I live in Pa.
when I had my sportster I never used less then 20/50. the owners and shop manuals both suggested 20/50 below 60 deg. 50W above 60 deg and 60w above 80 deg.
My softail books say the same.
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