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Old 12-10-2002, 06:01 PM
suginami suginami is offline
Join Date: Dec 2001
Location: Southern California, U.S.A.
Posts: 8,503
The only thing that can catastrophically cause your gas mileage to drop from about 20 mpg to about 8 mpg is your O2 sensor.

This is the characteristic symptom of a bad O2 sensor.
Paul S.

2001 E430, Bourdeaux Red, Oyster interior.
79,200 miles.

1973 280SE 4.5, 170,000 miles. 568 Signal Red, Black MB Tex. "The Red Baron".
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