Does anyone mix STP oil treatment in their fuel??

Being as thick as it is, a little should go a long way.

 

stp makes diesel injector and cleaner additive also. To answer your question, NO I havent ever used any oil treatment

 

I used the STP knock off wal-mart brand in my 1999 VP44 injection pump dodge cummins for 70,000 miles without problems. I also used a bottle or two in the crankcase.

With tht being said I don't know if it's a good idea though since I've learned that STP is high in zinc and other anti-wear materials. That could lead to injection pump or injector problems.