Ttt, so where are gas stations? I have only seen one in your post.

Thanks posting your trek, have enjoyed reading the whole trip so far.
Morocco has quite a dense network of gas station, particularly for Africa, so not too hard to find.
This is my map with only the fuel station I spotted pre-trip.
I planed all my routes from fuel station to fuel station and counted the distance.
They are only 2 parts that can be a little challenging for the fuel range of the FJ40:
- The desert part
- The yellow track was 300km in the desert and did not know how many were soft sand. I ended up not doing it but it's the reason I carried 2 jerrycans and on the map you can see a fuel station which is actually an auberge that is reported to have drum fuel available (and the plan was to check what had been my fuel consumption up to this point and if needed only refill a jerrycan here).
- The purple track is 200km (theoretical before the detours, getting lost, and playing labyrinthe in the dunes). Was not sure to be able to do it without the Jerrycans but with it's no issue even at the max fuel consumption I can do with the FJ40.
- The High Atlas mountain
- Some areas are remote and no fuel station are easy to access if you don't want to do a giant detour out of the area, so may be challenging without a jerrycan but definitively ok with.
A note on fuel as we talking about that.
I noticed that measured on road (on similar driving conditions) my FJ40 use a good 1L/100km less than in Europe. It also completely stopped vapor locking when stopped hot since I'm on Moroccan fuel, and generally start better.
Also I noticed that my Jerrycans "move" a lot less, I never aired them, they went from 0m altitude to 3000m, from 0°C to 40°C, and bulge was moderate.
The reason? My opinion is on the fuel, Morocco still has true unleaded with 0% ethanol. In Europe we can't have less than E5 (max 5% ethanol).
The volatility of the ethanol can clearly be felt and definitively the FJ is not burning it.... I always wondered how it was that it vapor locked that bad and how people did back then to deal with it.... Now I guess I have the answer.
On the other side on E5 my sparkplugs stay very clean and grayish (except n°6 were my valve sterm seal leaks oil) but since I'm on E0 sparkplugs are back getting black and dirty, showing it runs rich.
I think the reason is the ethanol that cleans the sparkplugs... Not sure if it's a better thing to have the sparkplug cleaned all the time or to have them showing the true state of your engine running condition.