nah, youre wrong bojack.
a good old landcruiser HDJ 79 R 6 cyl deisel was unbreakable to 500,000 km if you did the filter changes frequently.
with a modern 4 cylinder turbo desiel (that is in the ranger, bt50, hilux, navarra, amarok, isuzu and triton ) ie in nearly every modern 4 wd
you wont get 1/2 that mileage.
the CAT in a hilux needs a burn every 700 km, drive thru water after a burn abd its good night CAT (2000 bucks).
the exhaust recycling ensures the top of the engine is baked with black gunk,
old cars sprayed fuel all over the valves and fuel cleans,
to save a bit of fuel , some now spray direct into the cylinder, so there go your valves.
toyotas have an oil dilution problem.
tritons and navarras gum up.
injectors get fouled.
computer codes come on and you spend 1000's at dealers getting things fixed.
its false economy.
its great for the dealers, they make a fortune fixing crap when the warranty runs out or they scam with things like the tritons 10 year warranty

, and then have some 18 yo with acne charging you 900 bucks to do a service

.
fuel is the least of your worries,
buy the most simple vehicle you can get without all the junk on it.
service it yourself
if it sucks a bit more gas, you will still end up way way in front.
OR
buy a new 4wd
spemnd a fortune fixing the "built in redundancies"
junk it at 180,000 km when the cost becomes overwhelming
get me to tow it to the wreckers for you in my indestructable toyota