I drive an old Toyota pickup in the mountains, often using Waze in the Alps. Adding altitude is a great idea; it helps me predict engine load, especially when hauling uphill, and satellite view would have provided more accurate terrain. But after one trip, the engine started knocking from overheating on switchback roads. I had to urgently find a replacement, and before buying a remanufactured one, I started reading real-world experiences on accurate engines
https://accurate-engines.pissedconsumer.com/review.html . Reviews about quality and warranties saved me from making a mistake. Now I drive with more peace of mind, knowing the engine is reliable.