Some FAQ You Should Know!
I've been told to use the right additive.  What is "the" right additive mean?
The ‘right’ additives (at the proper treat rates) should work to eliminate all of the negative aspects of diesel fuels and allow the engine to properly transform all of the fuel BTU content into usable work energy (horsepower).
Genuine diesel fuel additives with the ‘right’ amounts of chemistries will provide cost savings for diesel fuel users when applied correctly in all applications in all types and qualities of distillate fuels.
But, the fuel user must also test a chosen fuel additive in a particular diesel fuel and in specific diesel powered equipment in order to verify marketing claims and prove cost savings. These steps take time but they should not be ignored as additive marketer claims cannot be taken for granted.

Can a diesel engine manufacturer stop me from using an additive?
The US Government recognized the "restraint of trade"
situation being created by the engine manufacturers against fuel additive suppliers and in 1975 passed the Magnuson-Moss Act. This legislation (among other things) makes it illegal for any equipment manufacturer to void a warranty because an equipment buyer uses a fuel additive.
In order for an engine manufacturer to void the engine warranty because of an additive, the engine manufacturer must improve the additive caused the problem” determined by that engine manufacturer as a reason to void the warranty. This is a very expensive undertaking and the reason engine manufacturers discourage the use of any fuel additive during the warranty period.
Generally, engine manufacturers do not specifically say they will void the equipment warranty if a buyer uses an additive. But, the engine manufacturer’s inference to equipment buyers regarding not using additives is clear then it is still illegal to make this claim.
"Cetane-Based, Premium Quality Diesel Fuel Treatments"