i just brought some CRC Lifter Kleen and read the can and it says exactly

Directions:
Read entire label before use
1.Add entire contents to crankcase. Repeat with every oil change
2.Use entire contents at once

the end.

Do i put this in with my new oil? or use it like an engine flush?im confused it did'nt help with all the dribble about what the product does it just made me more confused on when to put it in

has anyone used this before?

I've never used it, but I think you put it in with your oil.
Hasn't it got a discription of what it does, which suggests the same!?

Failing that ring the buggers and ask... better to be safe than sorry