can any one help with run b-100 in a two tank system is there any changes to do this and will it work ? i don't know much about what has to be done but i'm looking to do this to a 2003 vw jetta and 2003 6.6 chevy thanks

Yes it's possible, and it will work. There are lots of threads on the subject but not easy to find.
Basically you need a full dual tank setup, but instead of heating to 160*F, you need only heat to 50*F. You just need a dual tank setup with valves and a simple coolant heat exchanger.
A final heat boost, typically a FPHE or VegTherm is NOT needed. All you will need is an in tank heater and a fuel line heater.

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