Why is everyone afraid to run just straight diesel? I've worked with alot of diesel engines that get worked to the max 24 hours a day and never get any additives
Because there are benefits to additives. Are they mandatory? Hell no, but the lubrication, cetane points increase, cleaning agents, fuel stability agents etc all add benefits IMO.
I look at my fuel system as an investment. Lets look at an LB7 with 100% and a 12mm for example. That fuel system costs ~$7694.85 ($2550 pump and $5144.85 for new DDP SAC100%). If I can gain any life out of that system by running an additive it is money well spent.