I have read all of the threads I could find on this and I am beginning to understand the issue with horsepower limitations in improving fuel economy through a rear end swap to a 2:88. What about going with something less drastic? I am content to cruise at 55 if I have to to get the best mileage possible but since I plan on keeping my China Blue baby forever, I feel that even small improvements will pay for themselves over the life of the car, especially with B100 at $3.50/gal!

Best,
Rich Mason
1980 240D Manual 200k