Is it safe to use? I have a JCL Mp-150-B (150cc)..My scooter seems to be running fairly well, but when I bought it, it had been in storage for a few months and I put it away over the winter, had mixed some STA-BIL fuel stabilizer in with gas ran it for little while then tucked it neatly away..So if the Chemtool is safe to use, what would the reccommended amount to add to full tank of gas???  Gas tank size 1.5 gal