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Old 04-25-2000, 03:15 PM
Robert W. Roe's Avatar
Robert W. Roe Robert W. Roe is offline
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Join Date: May 1999
Location: Lehigh Valley PA
Posts: 1,330
My 1984 SD has averaged 19.88 mpg over the past 5000 miles. Most of this is suburban short trip driving, 2 to 10 miles. On the couple long trips I've taken it on, I got about 24 mpg. TXBill, is most of your driving at highway speeds? I've heard someone speculate about worn fuel injectors. I use Redline Diesel Fuel Catalyst regularly and my mechanic adds a full bottle of Redline 85+ at every oil change.
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