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Old 11-18-2001, 09:18 PM
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300d vs. 300sd fuel economy

I am going to be alot of road driving over the next 2 years and was wondering if their is much difference in fuel economy between the 300d and 300sd-81'-85'? I have had an sd and it averaged 27 highway

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Old 11-19-2001, 12:04 AM
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I don't think the difference would be that great. Though the highway ride of the SD would be better than the D.
1999 MB SL500 (110,000 mi)
2004 Volvo V70 2.5T (220,000 mi)
2014 Tesla Model S 85 (136,000 mi)
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Old 11-19-2001, 12:47 AM
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I got a carefully measured 31.1 MPG in my 81 SD on a recent trip ,never drove over 60,was on two lane highways with lot of grades....
William Rogers.....
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Old 11-19-2001, 04:20 AM
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I think the 300SD is the W126 (81-85) ?

There won't be much difference in fuel consumption - but there would be in terms of comfort - if both vehicles are well looked after ...
... Kerry

126 tailed by a 203, 129 leading the pack.
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Old 11-20-2001, 09:34 AM
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Probably not more than 1-2mpg between the two.....At one time I owned a 85 SD but I have never owned a 123 diesel.....but the SD is more comfortable and if you get a later model you get ABS and possibly an airbag on certain just with the added safety may may the mpg difference meaningless

1992 300SD
Columbus Ohio

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