Occasional puff of blue smoke
All, I don't think this is a problem but I am curious what the experts think. My truck is running great but have noticed that at cold start up it puffs blue smoke for a couple seconds. This part I think is normal. However, today the ECT was about 170 degrees and I stopped to back into my driveway put in reverse and noticed some blue smoke coming out of the tailpipe. It lasted until I shut it off in the driveway. Truck only has 38000 miles on it. A couple months ago Ford put ARP studs in, until then I never noticed any blue smoke.