"Fluids are also critical. I’ve added about a liter of coolant and two of oil in 3,000 miles."
Of course, fluids are critical, but one can get creative. Driving an old 190SL from Mexico DF to Texas, it started leaking oil. I carried extra cans, but about 15 miles shy of the border, it got low again and I had exhausted my extra cans. So, I just stood by the side of the highway and waved an oil can at passing cars. Within 10 minutes, I had the extra 2 liters I needed to make it to the MB dealer in Laredo.