Indeedy, there are many conflicting views on this one!!
Ive nearly done c.350 miles in my 182 and havent taken it above 4000rpm, mostly up to 3500 tops, but ive been "working" through the gears nicely up to those points..
I feel happiest doing it this way (rightly or wrongly) - as I still havent been able to find one gospel and technically conclusive answer to this topic. Most peoples running in policies seem to be based on opinion or advice of others rather than hard fact..
It *would* be interesting to see a scientific report/comparison on two different run in styles over a good sample of cars, in the same make model etc. Like myself, most people are using this forum to research some of the biggest purchases theyll make - so its important to get this right.
Maybe something for the Mods could do some research into?
Andy