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With it smoking more at idle, it sounds like a turbo, but that's just based on my research and what one Ford tech told me when I initially took mine in. Mine was not smoking at idle, so he said it wasn't turbo related. I guess he was right, because after 30 days it's finally been diagnosed as...

Mine was built in Kansas City, pretty sure in March. Owned a flawless Expedition with the 3.5 just prior to this and have a few close family members with 3.5s and no issues. Mine is still at the dealership-no diagnosis yet.

My 2021 3.5 is in the shop now (since yesterday). No word yet on what the issue is. Blue smoke on startup (warm and cold) and 2 quarts low at 2100 miles. Another quart low at 2700. There is definitely something major going on.

I have a 2021 3.5 Ecoboost with 2100 miles. Two quarts low today when I checked with towing approx. 5000 pounds from time to time over the past two weeks (lake boat). Brief bluish-white smoke on some start ups since I brought it home but not all the time. I had been checking oil levels, but...

Well, scratch that on the noticeable oil loss. I just got home from a lake vacation, putting about 300 more miles on the truck and towing a large boat back and forth to the boat ramp, and I was two quarts low when I got home. Oil loss must be much worse under a load, or, whatever the issue is...

I feel like it's got to be an oil leak issue somewhere due to the bluish tint of the smoke, but it's not enough to account for any noticeable oil loss so far, but we will see. Coolant level is good too. Hopefully, it's nothing major. OP and I are in direct communication, so maybe between the two...

I found your post while searching for answers to the exact same issue. I just bought a 21 3.5 Ecoboost a little over a month ago. It's had the slight bluish smoke on startup (sporadically) since I brought it home. There seems to be no rhyme or reason to when it does it. It is bluish-white, lasts...