I doubt anyone would really notice .85 unless you tell them, or they are fairly savvy. I don't think I've ever traded a car in where the dealer has done any sort of in depth inspection, put it on a rack, etc. Most do a walk around, run the VIN, and maybe drive it around the block.
I will say that I had a dealer tell me once that they couldn't give me as much for a Tacoma I was trading in because it had an aftermarket suspension; they claimed it couldn't be resold as a certified pre-owned so it would be sold at a loss. I believed this to be untrue and opted not to do business with them since I cannot abide liars. They didn't notice the suspension upgrade, I volunteered that I had it.
Private party sale, if the person is savvy then the upgrade might actually make it worth more to them. If they aren't savvy then it's a non issue.