Sorry for the ugly word winterization but it is on the doorstep whether we like it or not. Diesel is relatively new to me since all my previous boats were gas. Question is, should one add some type of treatment for the layup period such as stabilizer for gas? I do make sure I have run through both main and aux tanks during the summer so I know the diesel is relatively fresh for the layup period. I do tend to fill up rather full to eliminate as much condensation as possible.

Found this which kinda says additives sometimes work depending on the diesel fuel manufacturer (like we know where it comes from or the formulation ) which tells me either it is doing a good thing or pouring money into the tank when choosing to add something.

https://www.fueltechnologiesinternation ... -fuel.html

Also I do see "Stabil" does sell a diesel version.https://www.amazon.com/gp/product/B0036 ... 0DER&psc=1