I don't have any experience with this particular engine, but I do have some for the sizes each side of it. The .40 usesless than 4 oz's, as does the .51. My preference is for FAI fuel, no nitro, and about 18% oil with no more than 5% of that oil being castor. I believe that castor isn't really needed for these engines, and am not overly concerned if the oil is all synthetic.
Props are about what you would expect for the engine size. Testing will help you find the best for your use, but look in the10 through 12 inch legnths, and 6" pitch.