Hi,
I haven't an eco car either but there are a few things you can do.
Changes at your car mostly cost money and saves a few percent of fuel.
A good way is to use a higher tire pressure (44 psi or more).
Extremely efficient are changes in the brain.
Driving not so fast (up to 50 MPH), avoid using the breaks helps even more.
Only take things with you you really nead. Stuff should be left home.
Carrying boxes or any other things mounted outside only if you need too.
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