[diesel_mercedes] Re: Trip mpg, no AC, fast, windows down

 

24.8 mpg?? Not sure what passes for the norm but my '92 300D got 36.4 mpg on a trip from Marysville, WA to Portland, OR.  She routinely gets 28mpg in my around town travels. My '86 190D 5 speed posted 41mpg on a week of my wife's I-5 commute and gets 34 around town. This being Seattle you can guess we didn't use the a/c.  Both have 250,000+ miles on the original engines. I run slightly larger than spec Nokian Entyres; 205 *50* 17 on AMG wheels on the 300D and *195* 65 15 on the 190D. This gives a 3.5% and 2.5% greater rolling diameter respectively combined with what ever the whatever the reduced rolling resistance is.

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