I've just had a trip Dallas - San Antonio - Houston - Galveston - Houston - Dallas with 1051 miles including 100+/- miles city driving.

The car runs great for its 12 years of age. I can't complain about the fuel economy at all. Total gas comsumption was 40 gallons, thus a gas mileage of 26 mpg.

Before the trip I wanted to replace the spark plugs, cables and ingnition coils, hoping for better gas mileage but did not manage. Now I think it cannot be improved much. The gas mileage I am having is even specified for new cars of that model year.

One thing is to be mentioned though; a few days before I added cerma liquid ceramic Cerma Organic to engine oil and noticed smoother idle. Maybe there was some benefits from that product, which David Poole of European Performance in Dallas recommended to me. I'd like to hear your opinion about that too, before using it for transmission, differentials and power steering.

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1996 E320 since 1/16/08, 171K miles as of Feb 2011

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1989 300CE - R.I.P. Dec 29 2007
Other MBs (sold): 1992 300E-24 - 1979 350SLC - 1984 230E - 1990 300CE