The 27s seem more reasonable. The 30-something could have been a fluke, or an error in measurement of fuel volume (not all pumps cut off at the same point). Not too shabby though…

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1979 240D- 316K miles - VGT Turbo, Intercooler, Stick Shift, Many Other Mods - Daily Driver

1982 300SD - 232K miles - Wife's Daily Driver

1986 560SL - Wife's red speed machine