I wish there was a term in use that described the ratio of oil : fuel in a distinctly different way than air : fuel. Whenever this issue surfaces it becomes nonsensical to me, because richness has two different meanings to 2 stroke fans, but they get perpetually confused. Now that I am involved with 2 strokes they seem more interesting and appealing than ever before- I used to dislike them. It would seem that old 2 strokes designed to run on ordinary lubricants would have a substantial added safety factor when run on top of the line synthetics made for oil injection. For instance the 1962 Fuji we are getting next month probably was designed for 30w dino oil. We will use Amsoil premix in the same amount, which will I expect provide several times the protection. Same for Aero, to a lesser extent. When we installed the new oil injector in Aero, we left the adjustment the same. It seemed to have an idle setting, a point below it would not go, and any movement of the throttle would increase the amount of lube. Then we watched for smoke. Is there anything else to 'adjusting to specs?' Red's scooter runs well as it is and hardly smokes at all, and that is only sometimes when just started up. I am completely into original specs. Dead stock, as my brother calls it, has been what has kept me from disaster most of my biking career. I would appreciate your comments.