Low Sulfur Fuel?

[rubberfish]

Good points geo.
The debate over atf will never end.
Personally, I use Stanadyne, always.
I rarely worry about gelling, just lubrication.

 

[Diesel JD]

My thought was that the problems with the LSD and ULSD have to do with their having a lower aromatic hydrocarbons content which causes the seals in the IP to shrink and then it leaks.