Additives

[Mikes91]

My '06 has 33,000 trouble-free miles on the clock. Thinking about using the last of the Stanadyne "Performance Formula" and their "Lubricity Formula" on my Dodge/Cummins. Bottles are 4-5 years old and have never been opened, and have been stored inside in a noncondensing environment. Are these safe to use with the newer Cummins engines such as the one in my '06?

Bought the stuff for my '91 F-350, sold in '06.


Thanks,

Mike