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Mileage, O2 sensors and other things (archive)
[ Follow Ups ] [ 7-series (E23) Message Board ] [ Msg. Board FAQ ]
Posted by sky on October 26, 2000 at 08:38:49:

There are occasional postings where drivers talk about their E23 real world mileage. I was wondering however what seems to effect the mileage the most and what difference a functioning O2 sensor might make.

In my experience, I get 20 mpg at an indicated 80mph in my '84 733 with a 3.49 rear and 205/70-14 tires, and an O2 sensor that has not been changed in several years. I got 25 mpg in my Euro spec '85 735 with 3.25 rear and 220/55-390 tires with no O2 sensor hookup.

The BMW technical data book says these cars can achieve 29 mpg and I actually wonder if my euro car could achieve this. First, I should probably try driving a steady 55 mph, but I don't know if I can do that. Second, should I hook up the O2 sensor.

Anyone have real world experience on the gas mileage effects of the O2 sensor? What is your experience?

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