Mitsubishi 15,000km service intervals, and no synthetic requirement ?
My brother was filling his fleet with Tritons some years ago, as they had 15,000km servicing, which as a business meant less downtime, and with their warranty, they backed it....diesels as well.
I doubt that I'd really like to buy one (in particular a diesel) that was 15,000km serviced through the warranty period on dino.