I know to much about how little it takes to screw up an IP. I wouldn't put old motor oil in my beater let alone my SDL!
I spent over $300 to get my injectors right last year and I am not about to risk clogging the nozels to save a couple of cents on fuel.
Once I get my IP rebuilt this winter my injection system will be perfect. Only clean diesel will run through it filtered by an OE filter.
An IP cost's between $600-$800 to rebuild and injectors can run anywhere from $300-$500 for a perfect set.
Unless you have a 606 then IP's are like $1,500.