20/50 or 20/60 - Road Glide Forums
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post #1 of 4 (permalink) Old 06-18-2018, 09:44 AM Thread Starter
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20/50 or 20/60

What do you think, 20/50 or 20/60 for the M8 motor?
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post #2 of 4 (permalink) Old 06-18-2018, 09:54 AM
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Originally Posted by gman View Post
What do you think, 20/50 or 20/60 for the M8 motor?
20w-50 in the crankcase, whatever premium synthetic you can find on sale. Valvoline, Castrol, Mobil 1, Quicksilver, Pennzoil, whatever.
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John, Medina, TN - 2003 Honda ST1300 ABS, 2011 Kawasaki KLR 650, 2012 Ducati Monster 1100 EVO
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post #3 of 4 (permalink) Old 06-20-2018, 08:52 AM
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See what your owners manuel says. They will have different temperature ranges for your climate and viscosity suggestions for that temp range. For twin cams they recommend going up to 20/60 if you ride in 90+ temps, don't know if the M8 is any different. Im in east Texas and I always run 20/60. I do however switch back to 20/50 in the winter.

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Last edited by MyGlide; 06-20-2018 at 08:55 AM.
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post #4 of 4 (permalink) Old 06-20-2018, 09:21 AM
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I run 20/60 RedLine year round
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