How is it that everyone else's 300D's get 38 MPG, but mine only get 22 with a tailwind..?

http://cgi.ebay.com/ebaymotors/1980-Mercedes-Benz-300D-Diesel-FLORIDA-CAR_W0QQitemZ130086619146QQihZ003QQcategoryZ6330QQrdZ1QQcmdZViewItem


Is this possible ?






..

__________________
'87 924S
'81 280SEL

Sold ->

81 300SD -
93 300E w/ 3.2
85 300D-
79 300SD
82 300CD
83 300CD - CA
87 190E 5 spd
87 Porsche 924S

"..I'll take a simple "C" to "G" and feel brand new about it..."