In the manual which i used as a reference point DA recomend as their no 1 oil (on the list) as 100-1 amsoil. I went to a great deal of trouble to get the oil.They do stand by their product for two years but i guess this is not a long time for an engine.

Why do different manufacturers only recomend certain oils and dont guaranteee their products if you move out side of these.

How can DA what id call one of the more respectable engine companies recomend this if its no good?

The guy that gave me this info suggested i use non synthetics as they provide more power? I understood it the other way? Why use nonsynths as runin and then go to synths?

Has anyone tried running their DA's or any other engine on 100-1 for a long period?

The realy confused

Kingsley