I'll give em a go after the Opti-lube runs out and I'll see if i notice any differences,Hot Shot's Secret!
I run the Black Diamond oil, plus their EDT and Diesel extreme for fuel additives.
You're only supposed to use the diesel extreme once every 6000mi to clean things out, but the EDT is for every fuel up.
I've ran lots of diesel additives in my racing days, and have settled on this company. That article is from 2007, and there's been a lot of improvements in just the past few years. Might be worth a shot!