Stanadyne Fuel Additive

[Defender]

Considering adding Stanadyne Diesel fuel additives to my 2003 GMC 2500HD. Any thoughts?

[Heartbeat Hauler]

I use the Performance Formula plus the Lubricity Formula every fill up. Stanadyne is purty good stuff, and for awhile the only additive GM endorsed.

[leolkfrm]

been using it in my 03 lb7 in every tankful for about 3 yrs...no problems in winter and i think it runs smoother