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Author Topic: 10W40 vs 20W50  (Read 1475 times)

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charlevoix418

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10W40 vs 20W50
« on: April 08, 2008, 03:07:56 PM »
Can we damage a motor using thicker oil like 20W50, let say around 45-50 degree F?

I read Hondaman commentary that 1hp is lost using 20W50 oil.

Any opinion?

Raynald from Canada
CB350F
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Offline bert96

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Re: 10W40 vs 20W50
« Reply #1 on: April 08, 2008, 03:52:20 PM »


 i run with 20w50 for about 8 years now without any problem!
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QA50 1969,ST-90 1974,mb5 1982,rz350 1983,shadow 1100 1985,vf1000f 1985,BMW K1 1990,shadow tourer 1100 2001,vfr 750 1994,vtr250 199?

charlevoix418

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Re: 10W40 vs 20W50
« Reply #2 on: April 08, 2008, 04:43:32 PM »
Bert,

is it sometimes cold in your area?

Raynald
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Offline bert96

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Re: 10W40 vs 20W50
« Reply #3 on: April 08, 2008, 04:54:00 PM »


 Yes,but less than you,i'm in Monteregie ;D


 Salut!
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QA50 1969,ST-90 1974,mb5 1982,rz350 1983,shadow 1100 1985,vf1000f 1985,BMW K1 1990,shadow tourer 1100 2001,vfr 750 1994,vtr250 199?

kaysystems

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Re: 10W40 vs 20W50
« Reply #4 on: April 08, 2008, 05:25:43 PM »
I've used 20W50 at 45 degrees without problems. Colder than that gives the starter a tough time. I live South Shore Montreal & ride down to about 28 degrees in the mornings as long as the roads are not frosty. I need 10W40 or even 5W30 Rotella synthetic for those mornings.

David
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