Originally Posted By: Hitzy
Originally Posted By: andrewg
Here is an interesting link with what seems like some valid testing on auto vs. motorcycle oils. I may have to rethink what I believe.
http://www.ducatimeccanica.com/oil.html
That article is ancient....SG PCMO?
You can look in the used oil analysis section and see how some conventional oils still shear today in a certain engine, and the syns stay in grade for the most part. I don't know anyone that uses dino bike oil....dino HDEO or diesel sure, but most bike oils are syns these days.
I'd like to see a modern test like that in a few different bikes, where 10w40/0w40 syn PCMO was up against 10w40/0w40 bike oils and see if there really was a difference in shearing, exteded OCI, and wear metals.
Older yes, but not invalid when it comes to the point of viscosity breakdown of auto vs. cycle oil in a motorcycle engine. May even be more to the point since oils are probably slightly better now (but not much). I didn't realize that viscosity breakdown wasn't even an issue. It woke me up being that besides friction modifiers, and how they relate to a wet clutch, my main concern (viscosity loss) is not a concern.
And I will have to disagree with you on the synthetic comment....I know many fellas that use conventional in motorcycles/watercraft/ATV's.
Originally Posted By: andrewg
Here is an interesting link with what seems like some valid testing on auto vs. motorcycle oils. I may have to rethink what I believe.
http://www.ducatimeccanica.com/oil.html
That article is ancient....SG PCMO?
You can look in the used oil analysis section and see how some conventional oils still shear today in a certain engine, and the syns stay in grade for the most part. I don't know anyone that uses dino bike oil....dino HDEO or diesel sure, but most bike oils are syns these days.
I'd like to see a modern test like that in a few different bikes, where 10w40/0w40 syn PCMO was up against 10w40/0w40 bike oils and see if there really was a difference in shearing, exteded OCI, and wear metals.
Older yes, but not invalid when it comes to the point of viscosity breakdown of auto vs. cycle oil in a motorcycle engine. May even be more to the point since oils are probably slightly better now (but not much). I didn't realize that viscosity breakdown wasn't even an issue. It woke me up being that besides friction modifiers, and how they relate to a wet clutch, my main concern (viscosity loss) is not a concern.
And I will have to disagree with you on the synthetic comment....I know many fellas that use conventional in motorcycles/watercraft/ATV's.
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