Amarok? Dad just got one of those, they're 15k, but then so's their Audi. No idea if that's just a VW thing or a diesel thing.
My logic with these things has always been they're second hand cars, and I've always just changed the oil every 5k. This car might be different, as it is more modern than anything I've owned previously but I'm happy to do it anyway, and it's not going to hurt it. Small price to pay for my peace of mind. Then again since dad has a workshop, it's pretty easy for me to knock over quickly on a Saturday morning, and I don't have to deal with offloading oil, crawling on the floor, etc. Just chuck it on the hoist, drain it into the oil tank, nip it up and you're done!
And yes, I am more than a little paranoid. But I'm ok with it!