"The way he had to save fuel, save tyres, use energy is a completely fresh input into this, so there's definitely some valuable insight into what we are doing that we wouldn't have had if we'd taken more of a standard approach with a single-seater driver.
"The technologies are different enough that there's no technical transfer, but it's more the process that you go through and the way that you look at it.
"I think it's been good for Honda, but it's been good for the whole team to get that fresh and unique insight."
Hartley is hoping that there will be some advantage for him when it comes to having to save fuel in certain races of situations.
"I think where it can be an advantage is I'm quite used to having to be very efficient because we were so restricted on fuel there," Hartley said.
"So if we get to a race where we are very restricted on fuel, I feel like it's a good strength. Obviously, working on such a project is all valuable; all experience is good experience."
Hartley is in action on Saturday with free practice before qualifying on Sunday and the race on Monday morning.