How did you deal with mixing gas and oil? It’s my understanding that at least some years ago, you could find pre-mixed gas and oil at the pump in at least some European countries.
Did you just carry several cans of oil with you?
I visited Germany for a few weeks back in 1986. At that time, a lot of kids were riding scooter (two-cycle). Most of the pumps had a deal where you put in extra coins and the oil would pump out with the gas - I honestly can't remember how it mixed for the right ratio, but the pump did it all for you.