As the title says, my friend's 300D is getting in the low 20's (60 MPG 350 mile cruise netted him 22 MPG). I've made sure no brake calipers were dragging, fuel filters changed and the odometer is right on.

Does anyone have further suggestions?

Best,

__________________
Regards,
Ian White

1995 E300 Diesel w124 OM606
2014 E550 w212 M278 biturbo

2001 BMW 740i E38 M62 (past)
1981 300SD w126 OM617 (past)