I'll run a can of BK44 through it once a year, best right after a fuel filter change, so it cleans pumps and injectors instead of the fuel filter. Get that at Carquest. Stanadyne during the winter especially, and lond road trips. Not so much during the summer. Get that over at Central Motive power. Just my preferences. I only have 76k miles though. In the winter I seem to get a slight miss at idle sometimes, only when I don't have any fuel treatment in the tank.
KVaughn, I was wondering if you have a 53 block, I've looked all over my '99 and don't seem to have one!