Citroen Xsara Picasso poor mpg 30?

Car: Citroen Xsara Picasso
Variant: 1.6 petrol
Model Year: 2008
Categories: Engine & Drivetrain
I have very poor MPG my in car says its 30.1 overhalbut nerve changes where as the real time does change a lot 15 to 300 mpg going down hill have not done a fuel / milage check but I know its poor due to the amount of fuel I put in
any ideas
Posted: Jan 16, 2021 (3 years ago)
Check the basics first of all , plugs and air filter
Posted Jan 17, 2021 (3 years ago)

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