Originally Posted by WindSailor
Now are you referring to something like this?
bobistheoilguy's page on Esters In Synthetic Lubricants
I've used Amsoil and Mobile1 in the past and a friend of mine is trying hard to convert me to Red Line which uses an ester based stock. Naturally I would have thought an oil that is made for motorcycles would take this 'seal issue' into account. But I would also like to hear more...
I'm not against using dyno oil (in fact using it now), but synthetic's additives I believe are better as far as temperature goes etc.... that is the main reason for me in going in that direction as soon as this bike is broken in.
Any good synthetic GL5 is fine. Change it regularly and you will not have a lubrication related failure.
As for Red Line, I've used it in my Guzzi trans and bevel drive for many years with no issues. It actually improved shifting. I ran it in may RT trans also without any issues.