It will take a while, I don't know the actual number - but your rings have not fully seated yet. I have a TD that has roughly 2000 miles on a fresh rebuild and it seems weekly it's getting better mileage all the time. I wouldn't take some blowby at this time being a bad thing. I can't say, but I think you'll get a bit of blow by on these because of compression 22:1. No bid deal - my$.02