The part of the IP that creates the 135bar fuel pressure is lubricated by the Diesel Fuel (or fuel if you are using something else) and it does not mix with the Engine Oil (in fact if the IP Elements wear out Diesel Fuel can get into the Engine Oil).
The Engine Oil lubricates everthing else inside of the IP.

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84 300D, 82 Volvo 244Gl Diesel

In my old 83, I once burned a few gallons of
Tiki torch oil........No report on insect populations

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81 Mercedes 300SD 289k.......SOLD
82 Mercedes 300CD 252k......slow ride

82 mercedes 300 SD...mi Unknown
83 Mercedes 300D ????ksniff..gone too
84 Mercedes 300D 148k........SOLD
85 Mercedes 300TD 386k and holding some one elses project

+1, just run the diesel and be done with it. Power Service in the winter, but I've seen some low temps after forgetting the antigel and car ran fine.

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'02 BMW 325i
'85 300D 450k
'93 190E 2.6 170k(killed by tree)
'08 Ducati Hypermotard 1100S 6k
'06 Ducati S2R800 14k(sold)

Yeah low temps *shouldn't* be a problem provided you've got proper winterized fuel. I bought my 190D in December in New Jersey and hauled it north on dollys. When I got it to MA it was MUCH colder than when we'd left NJ (like 20F vs 50F). The car had sat for a month or two before I'd bought it and hadn't been refueled in who knows how long. When I got it started the next day it'd idle okay but had zero power. I put in a bottle of power service (the whole bottle, like 10x the recommended dose) and let it idle for half an hour to circulate that around. Then took it to the gas station and filled up with good diesel, at that point it drove fine.

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Sadly Benz-less