Hey all, I am new to this site, and have a 1997 PowerStroke. I recently got a good deal on several quart jugs of Lucas fuel additive, and was wondering if this is a good lube for my diesel, or if it will hurt anything. I do not like the harsh smell of Power Servie, but would still like to add some lubricity back to the ULSD. I know about FP and Stanadyne, but both are expensive here. What say you experts on this? Thanks for the info, and what a cool site with lots of knowledge!!!