Star said the old owner of my truck used farm fuel so the restricted the warrenty no engine warrenty is what they said any one heard of this

 

Yeah, DC will restrict your warranty if they discover that you're running dyed fuel...not to mention that they might turn you in as well.

No real differences in the fuel usually, except for the dye. But it's just one of the many ways they'll find to void you.

 

farm fuel may be cheap
but cost mucho buckage
heard stories of fines up to $20,000

 

In Canada it's legal to run farm/dyed fuel in trucks registered as farm trucks. You may want to bring that up with them. They can't deny warranty here.