Greg Zulak of Muscle MAg says water bases, like V and T suspension are best because they attach quickly to the receptor and thus promote muscle growth wheras an oil has to break down before attaching. I have not tried this yet. I have used prop, and find that injecting every other day works great. The overall goal is to constantly keep something in there as to stretch the muscle facia tissue and forc the muscle to grow. However, I am not an expert. Fuck synthol. Use stuff with a medical value.
That is my two cents.