The concern is that ethanol attracts water and fuel system parts corrode as a consequence, so carmakers tend to be very conservative when making recommendations like are being asked to with E10. E5 fuel contains five percent ethanol, a very small amount, whereas E10 has 10 percent, still a small amount. I would run it on E10 if that were all that was available, and I really doubt you would have any problem with it.

IT SOUNDS as though it's running too lean at idle. Have the carburettor adjusted to the correct idle setting and check for a vacuum leak, because that can cause this sort of instability. I would have an experienced LPG mechanic check the system for you.

I'D GO for the GQ Nissan Patrol. It's tough, plenty of parts are available and everyone knows how to fix them. I don't have any real problem with the Jeep, though early ones were poorly built and rather rudimentary with a small cabin.