Amsoil Saber (100:1) is designed for lean lubrication applications and was not designed to be run at 32:1. Amsoil designed another oil called Dominator (50:1) that can be used in richer lubrication situations such as 32:1. It is best, if you are going to use Amsoil to use the proper product.

Since my ZDZ80RV is supposed to use 40:1 oil and premium gasoline, as recommended by the manufacturer, I mix Amsoil Dominator at 40:1 with 91 octane gasoline and use it in all of my engines (ZDZ, Brison, Zenoah, and Sachs-Dolmar). After several years, I have never had a bit of problem with this mix and I do fly a lot. I don't think you can buy a bad synthetic oil for use in our engines the way we fly them.

Make sure that the oil you buy has a rating of API TC (higher temperature, air cooled) and not TC-W3 (water cooled engines). If it has both ratings then it should be OK.

Of course, good air cooling is as or more important than what we use for lubrication.

http://www.lubeoilsales.com/products/fab_four.htm