bigben

PS: I am in my late sixties and still doing the RV thing. LOVE IT

I don't believe it does - simply because it is reversible. When you buy the 5 Star tune it comes with the electronic device to install. One of the steps for install is to read and store the current/factory tune. If in fact you need to do service and you are at all concerned, re-install the original tune. The change is not tracked. Hope that helps.

Also, here is the email address for Chris from 5 Star chris@5startuning.com. Feel free to mention my name - Ben Lane. Chris has been very helpful

Big Ben
I am old and dumb, having trouble finding the 5 star for RV, also curious if it affects your Ford warranty in any way