We are at an average of 20.8 in mixed driving since January. On the highway- straight 70-75 MPH we are at +-27. I think yours is about right.

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Dave

'05 325xi
'10 E70 35d
'85 911 Carrera
'66 911 Work in progress
'91 Chevy C1500
'95 Jeep Cherokee
‘18 Jeep JLU