I have had this 1988 260e for the last 10 months.. have only put about 6000 miles on it, so I usually fill up at the half way mark and never checked mileage.

ran it a lot this week and did... only got 19 mpg in mostly highway driving.

I know the CE gets 24-25 on the highway.

could this be a function of high mileage and the fact that it needs valve stem seals?

engine runs perfectly. 212k miles.

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1989 300ce 129k
( facelifted front,updated tail lights, lowered suspension,bilstein sports, lorinser front spoiler, MOMO steering wheel, remus exhaust,stainless steel brake lines). (Gone)

1997 s320 154k (what a ride). Sold with 179k miles. Replaced with Hyundai Equus

1994 e320 Cabriolet 108k



1972 280se 4.5 153k Owned for 12 yrs, sorry I sold it


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My 300E got 25-26 mpg on hwy at 350K miles. You may need O2 sensor or a lambda adjustment-some mechanic may have played with it. Valve seals should not make that much diff. Locate the problem first.