Agreed with Dean. The numbers are mostly the same between small six, big six, and eight.

I dug around http://www.fueleconomy.gov for a bit. The 400E/E420 engined car is indeed rated at 18/24. The 3.2 liter M104 is rated at 20/26 in 1995, isn't listed for 1993. The numbers seem to have moved quite a bit between 1993 and 1995 - perhaps the EPA changed their rating system? They don't have a listing for the 2.8 liter car; somewhere in the distant past I recall it being 19/25. Anywho, point being there isn't much difference.

All these numbers are for the sedan. Wagon (better start calling it an estate...) are consisently 2MPG lower city and highway.

- JimY