Saito
If you do take the backplate off you won't find anything except maybe some black grease to get the bearings off to a good start. Bigger Saitos run on 5% nitro much better than the small ones, my .30 runs well on 5% but the idle is pretty shakey. Yours will run super on WildCat 15% Premium Plus, it has 18% oil of which about 2% is castor and the rest syn.