for what it is worth, I believe mine is about that clean and if you are that clean at 100k you should be at 200k. I took the EGR tube off last year when I was having the turbo-shutdown problems (intake tube leak) and there wasn't but a just a tiny dusting/film of powder on it and the intake had some light powder in it, not much slime. I'm no guru but this is my 2nd ecodiesel, we had an early Jeep which "polluted at highway speeds" lol.... for 80k and sold it before dieselgate. that thing did a whopping 5 miles a day for 4 years.
i have watched the live data on a scan tool to see the egr functioning and the more you can either keep that thing closed or the hotter you can run the combustion, the better off I think we are. Additives increase the chamber temps and sort of defeat the EGR in that way especially when you run long trips and get full long duration temps. it takes some time to get all the intake parts saturated with heat but i did measure the hood strut and some parts with a heat gun last year in 90 degree ambient air, after 30 miles highway the strut was 130F, it'd blister your hand. there is no way you're getting 130 F hood strut going 10 miles, the intake cover was 154, i have the photos saved on my phone.
heat is your friend right up to about 230F on oil then it's our enemy it seems lol. It really operates well in a very narrow temp, 215-230.
I will be doing a very tough tow of a 35' white box Jayco out of southern new england elevation like 150 above sea level, over the berkshires to 1,729 feet, 2nd highest point on I90 east of north dakota on Mass Pike, it's brutal for east coast and then all the way up to adirondacks. i go from elevation 150, up to 1700, back down to elevation 500 and then back up to 1800 in a 4hr trip and 100' rollers along the way, plus 15mph head winds from the west. she'll bake a cake under that hood for sure. its so easy to hit 240 or 250 with the 3.92 gear, can't even use all of the pedal lol. i'm also rolling with 60lb e-rated all terrains,doesn't help lol. anyways, heat is good if you can keep your foot out of it and be patient. i try to stay below 240 oil and just go as fast at she will let me like a 90's silverado lol.