Topic: 10W40 vs 20W50

[charlevoix418]

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

[bert96]

 i run with 20w50 for about 8 years now without any problem!

[charlevoix418]

Bert,

is it sometimes cold in your area?

Raynald

[bert96]

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


 Salut!

[kaysystems]

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