Might I suggest you save lots of $s and make your own?
If you mix 20% Coolpower Blue Oil, 10% Nitro and 70% Methanol both two and four strokes run perfectly and this mix meets the warranty specs of all manufacturers (at least in Australia it does).
By buying methanol in bulk along with the oil and nitro methane you save heaps and never have to worry about consistency. If you have an engine that is inverted up the nitro content to 15% and it won't stall when throttled back on long finals.