WWOMACK,
There are quite a few people using the B-99 for all their fuel needs. No diesel!!!! B-99 is a fuel.
To get the desired results (proper fuel lubricity), all you need is 2% B-99 added to your diesel. That will give your fuel system all the protection it needs.
The "lack of lubricity" seems to not be much of a problem, anymore. As of a few years ago, the refiners seem to be adding enough lubricity to the ULSD.
The nice thing about the B-99 is that it is an actual FUEL that, also, acts like a lubricity additive. So, if you put a gollon of B-99 in your tank, it's like putting a gallon of FUEL in your tank. The by-product is the added lubricity. Makes the use of B-99 as an additive pretty cheap!!!
I keep a five gallon jug of B-99 & add a bit to the tank when I get a load of ULSD. I can still get LSD, here in the Phoenix area. Plenty of natural lubricity in LSD. It only seems to be available at truck stops (Flying J, Quick-Trip).
Joe F.