There's no way of knowing what effect a fuel treatment might have on fuel lubricity without an HFRR (High Frequency Reciprocating Rig) test that the industry is using to determine fuel lubricity. The fuel treatment manufacturers have the money and incentive to conduct these tests, but the home brewers out there are basing their opinion on hunches. My guess would be that a mix ratio for diesel fuel and 2-cycle oil (used in a 2006 model year diesel or older) would be in the range of 200 to 500:1. But that's just a guess.

Don't use any sort of oil in the new 2007 model year diesel powered vehicles as a fuel treatment. The cats and soot traps would likely be damaged as a result.

Buy commercially available B2 (2% bio-diesel) and not worry about it.....

Jim