Mine varies quite a lot, but after doing a very thorough cleaning of the coolers on the top of the engine and blowing out the fins, it runs more toward the lower half of the guage. Last year it got ground ready ahead of our planter and had to run quite hard to stay ahead of the planter. It ran alot warmer then, which is why I worked on cleaning out the coolers so much. I am impressed with the 9670 performance. 584 cubic inches can get a lot of work done. The only dislike, is the shift between 9 and 10. It will about throw you out of the cab if you have her throttled up much.