2014 Cruze Diesel - White 140,000 km
1998 XJ 3" 31" Hakka LT 350,000 km
1998 XJ 3" 31" Hakka LT 320,000 km
The trucker hauling the fuel might know what HE added to the loadout. But does he know how it was brewed?
He might have some vague idea but for US. The consumer. We have no clue.
Mistakes can happen. The F-250 dude didn't refuel when he arrived in MN from TX, else his wouldn't have gelled up at -16F over his multiple Hampton Inn nights. Clearly his mistimed his refuels and/or he did not refuel at his northernmost destination. Maybe he had the dual-fuel tanks too, who knows. You gotta think ahead with this stuff: burn off the warmer-climate-diesel and refuel with coldest-climate-diesel upon arrival.
No mistakes from my son the former tanker-delivery/driver now supervisor. Drivers at his place are fired for failing to report minor mistakes. Honesty is paramount. He knows everyone at the terminal and knows every processes & procedures all the way from terminal to consumer fuel tank, including the ways to test/verify/calculate what is in each "compartment", every detail of every safety procedure, in addition to 'thinking outside the box' when the going gets rough or something weird happens. He is not an engineer or physicist but asked "laymans questions" in his first week on the job relating to physics & angular momentum of the fuel compartments that prompted the 50 other drivers to all say "I've been driving for 40 years and never thought of that and barely understand it". He knows petroleum/fueling/tanker/hazmat-delivery operations & processes & procedures similar to how I know computers from transistor/solid-state/quantum-mechanics level up to the highest level languages & APIs. Also he knows all the unwritten rules/tricks/workarounds that drivers do, the stuff that isn't in any book. He supervises all the other drivers now.
They have ways to measure what is in the compartment and to "fix" in case of a wrong mix (back to refinery and re-refine it to separate the wrong mix.)
In the tanker-driver training videos, a happy voice at the end always announces something like: "remember that the tanker you are pulling is considered a weapon of mass destruction under international law!!!"
I was just up in Plattsburgh, NY where the temps went to -3F/-19C and I didn't have problems, but I also used Power Service in the white bottle. I did run into 1 station that had gelled pumps, so not everyone is cycling through fuel fast enough or getting the right blend. I had to drive another 30 minutes for a station that had diesel. I prefer to use the additive just so I don't get stranded because not everyone else is on top of things enough to ensure a low enough gel point for the nightly low temperatures.