Coaltrain mentioned Power Service 911,, so I Googled it.
At Home Depot, I found this,,,
"Diesel 911 is a winter emergency use product.
This Winter Rescue Formula reliquaries a gelled fuel and deices frozen fuel filters to restore the flow of diesel fuel to an engine. Diesel 911 does not prevent fuel gelling. Use Diesel Fuel Supplement with Cetane Boost as a preventive measure to keep fuel from gelling. Diesel 911 and Diesel Fuel Supplement with Cetane Boost are compatible in diesel fuel and may be used at the same time.
I then Googled "reliquaries"
plural noun: reliquaries
a container for holy relics.
These tractors may be containers for holy relics,,, and we never knew it!!
A reliquary (also referred to as a shrine or by the French term châsse) is a container for relics. These may be the purported or actual physical remains of saints, such as bones, pieces of clothing, or some object associated with saints or other religious figures. The authenticity of any given relic is often a matter of debate; for that reason, some churches require documentation of the relic's provenance.
So, what, exactly, is Home Depot trying to tell us about these tractors??