RE: Oil spatter
its been my experience that mineral based oils have much better rust protection for things that don't get used very often. its usually best to break in engines with mineral based oil and in the end, i see no real reason to switch over to synthetics. its pretty much up to the user if you want to use synthetic, but i would stay away from low ratio mixes like 100:1 amsoil, its just isn't enough protection at that level. in my rc engines, 32:1 for break in and 40:1 after break in, i do have a converted supertigre on ignition and gas that requires 20:1 mix because the con rod uses a bushing instead of bearing, i have a dle 55,30 and a da 100, all at 40:1 the dle 55 is going through its 15-16th gallon with no issues, and the da has roughly 22-23 gallons, all have hardly any carbon build up and most importantly, rings are not stuck. don't worry about oil spatter, a little bit is a good thing to see