Injector shop indicated that not only is Stanadyne useful in keeping soft seals healthy for longer periods of time, but that was its initial development purpose. So, I'll start using it and see if I notice a difference; if everything that I've heard about it is correct, I'd be surprised if I didn't. The leakage around my pump's high pressure nozzles wasn't from bad soft seals, but the hard, copper seals had cracked. *Rudy & Jill Sechez * *BRINEY BUG-a 34' Sail-Assisted Trawler * *Anchoring Consultants-trawlertrainingabc.com* *850-832-7748 * *Georgetown SC Northbound-Chesapeake*