The sus250 is oil based, and I will make the assumption that the "stan100" is water based, because I'm not sure. The two can be put in the same syringe....BUT when injecting be well aware that water based will inject much faster, so you have to use a controlled and slow injection, when the water based hits the pin if you don't let off on the pressure you will be injecting too quick..
If the "stan100" is water based winny, you always have the option of drinking it too, and just shooting the sus250.
Run, Run, Run, the postal inspector is at your door!