Motorcycle industry is in deep trouble and needs help fast | Page 22 | GTAMotorcycle.com

Motorcycle industry is in deep trouble and needs help fast

5W40 T6 full synth

don't wanna argue
but for my thinking
15 cold weight is too thick for a cold start

the advantage with synth
is not with contam properties
it's got to do with the base oil being less susceptible to shear down
ie: viscosity breakdown during high revs/heat...
True, but it's not all that relevant. Oil contamination (blowby, fuel contamination) is the limiting factor for oils in small high performance engines. In the normal service interval your oil will not fall out of spec from shear or thermal breakdown unless somethings seriously wrong with your engine.

In the 40 years years I've owned bikes, I have never had an engine failure due to lubrication. I have a 3 bikes in my garage 35, 42 and 50 years old respectively, they all have more than 100K of hard riding -- all they ever enjoyed is a specified grade oil changes every spring and again at every 4000KM in riding season.
 

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