Since we are camping most of our trip it is way more convenient and safe to be consuming powdered milk. We have, at least for 24hr summary of our diet, heavily been consuming Nido; I put it in my tea every morning, it was in the crêpes for breakfast, the sauce at lunch as well as the soup at dinner time.
Nido, I think, utilizes a fair amount of oil as it is a pretty intensive process to turn milk or cream into a powdered form.
Here is a little diagram that briefly explains the process.
The process seems like it employs very heavy machinery that could very well be powered by some sort of oil. The storage of milk in the holding tank alone indicates probable oil use as well of the delivery by truck of the liquid milk.
Nido also contains Soy Lecitin which is obtained by the extracting of oil out of soy beans, once oil is derived from the soy bean lecitin is extracted by one of two processes,steam precipitation or centrifugation. In other words, heavy processing is involved just in one of the only ingredients added to Nido.
On top of all this processing, Nido is imported to Tanzania from the Netherlands adding to oil consumption by needing to be stored and flown far distances.
(image borrowed from https://www.usaemergencysupply.com/information_center/powdered_milk_made.htm)