First off,I just found this site.I bought a clean 68 220D last year.I'd been wanting one since the first time I saw one back in 68' in a Pink Panther movie.Mine's from the southern deserts of New Mexico.It sat undriven for 17 years before I bought it.It was starting to get stiff due to rust haze in the cylinders.Turned it over by hand untill it loosened up some.Then I primed the fuel system and it started up and runs great.Ran it for about an hour,then gave it an oil & filter change.Last owner kept maticulous records,including every fuel fill and mileage.He bought it when it was two years old.That's the basic history of my car.

My question is this.I've heard these 4 cylinder Mercedes were always kind of thirsty for motor oil.And the last owners log book says this one has always used about a quart every 300 or 400 miles depending on what kind of driving.Is this kind of the norm?And he averaged 29mpg fuel.Normal?
I checked out Total Seal Gapless Rings online,and saw they make gapless rings for these engines.I've had some experience with these in performance gasoline engines.But I have never heard of gapless rings being used a diesel before.Good valve stem seals and gapless rings should virtually eliminate oil consumption,improve performance,and increase mileage.Has anyone else used gapless in their Mercedes diesel?Would I have carbon problems?Any advice on making this engine better is appreciated.

Also,would an air cleaner from a newer 240D engine be an easy swap?I hate oil bath air cleaners,and would prefer the newer style housing with a K & N filter installed.And lastly for now.Would later model factory Mercedes aluminum rims fit my old car?I've never liked hubcaps either.Even though I have 10 of them.
Thanks for any help or advice you can give.