Fuel additives ?

Anyone use them and are they necessary ? I'm not looking at the additives as a performance enhancer, but wondering if they are necessary to keep the injection pump healthy, assuming it's lubricated with fuel, right ? I did a search and came up empty.

Scott W.

2001 Dodge 3500 CTD making 450 RWHP on #2 alone. 2002 blue ZX-12R, stock, but not for long. I am my own warranty station. </p>