Hi, I did a search on synthetic oils and seems its the way to go after break in. At my local shop they have the following oils: Amsoil Interceptor Amsoil 2 Cycle injection Oil They also have lucas semi synthetic oil. Which is the best to get? Also these are labeled injector oil, but it says ok to mix as a 50:1 -- Seems crazy to go that high. What would everyone recomend for an 80 cc china engine?