juls

Thank you I will do a more controlled test as you have and let you know

Thanks makes me feel alot better as your right it is not the lightest of cars as you say

Can any one help me as I Have a diesel 2.0 HDI C5 and I am only getting average 42 MPG this is driving on a Motaway at about 65 MPH around town its only about 30 MPG. The engine runs OK and drives fine I can not understand why.