Any question answered...

Thanks Hefty. The yellow engine/oil warning light only came on for a couple of km before it stopped, so I'd hope Toyota made an engine that checks itself before it wrecks itself.

Ideally you should have stopped when it came on and checked what it meant as there's every chance it meant 'stop now or the engine will blow up in a couple of km'.

Never mind, the Congo Nile Trail sounds way cool.