Hello,
I have logged a W124 260E(USA) fuel consumption for almost 75,000 miles. On any interstate trip at 70-85mph (when I drive) it does at least 28-30mp/usg with a/c in operation and two person+luggage. In urban usage, 22-24mpg in summer(a/c in use) and 20 mpg in winter. Other drivers in the household always get at least 3 mpg less. IIRC, it has a 3.27 final drive, so it is about 21mph/1000rpm in top gear with stock 195/65x15 tyres.
Just my 2 cents.
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Nachi11744
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