[sparky660]

I always used the amsoil diesel concentrate in my 2005 for obvious reasons but am curious if it is beneficial to use it in the 2011 I bought. Does anyone use it in their 2011's?

 

[DENALI HD3500]

I don't add any additives to my LML, fuel system is designed to work well with ULSD.

 

[envelopo]

I used Stanadyne performance formula in my 05 and it made a significant difference, esp. in smoothness and runability. In fact I used to swear by it. Since I have about 1/2 a gallon left over from that truck I have tried it in my LML, it does not seem to have the same pronounced effect. In fact I think the LML runs posssibly better without it. Owners manual does not condone additives and it downright forbids any that contain alcohol. That said, I might still use it when it gets real cold and mabie once in a while to help condition or help clean out the system, but I don't think it is a necessity like it was with my 05. Plus, it was costing me the equivalent of 15 cents a gallon more to use it!

 

[jmac5058]

Why would a 05 need to have it but the new one you question?Just confused.

 

[HD Dmax Machine]

If you get an additive that says it wont damage DPF & doesnt contain alcohol use it.
ULSD fuel has reduction in lubricity. Use an additive thatll help with lubricity.

 

[redwngr]

Fuel from a quality source should have all the additives you require, and the correct winter/summer blend for where it is sold.

 

[DENALI HD3500]

Why would a 05 need to have it but the new one you question?Just confused.

When the 2005 diesel were sold you were able to buy diesel with sulfer(this lubricated system). Now you can't buy that diesel and an additive is recommended for pre ULSD fuel systems. New truck is designed with ULSD in mind.