Volvo Owners Club Forum - View Single Post - Engine: B8444S: - 2007 XC90 4.4 Fuel consumption difference.

HunterBruce · Nov 23rd, 2021, 14:11

I have two 2007 V8 doing an experiment on improvement on fuel economy.

On highway at 70-80MPH getting 24-25 MPH on one and 25-26 MPH on the other both on Petrol.

4% Difference. I wonder why, have any of you got idea's pls.

Diff Tires. (Same) 20 - Not
Brake binding slightly -Checked.
Wheel bearings. ?
Any other factors, any ideas to check welcome?

Thanks.

FYI - The higher mileage one is better. Both have had recent service.

Nov 23rd, 2021, 14:11	#1
HunterBruce Junior Member Last Online: Dec 5th, 2023 10:19 Join Date: Dec 2020 Location: Exeter	2007 XC90 4.4 Fuel consumption difference. I have two 2007 V8 doing an experiment on improvement on fuel economy. On highway at 70-80MPH getting 24-25 MPH on one and 25-26 MPH on the other both on Petrol. 4% Difference. I wonder why, have any of you got idea's pls. Diff Tires. (Same) 20 - Not Brake binding slightly -Checked. Wheel bearings. ? Any other factors, any ideas to check welcome? Thanks. FYI - The higher mileage one is better. Both have had recent service.