OBD2 'fuel saver' boxes can actually increase costs by damaging your car - do this instead

No, there's no cheap - or expensive - dongle that you can plug into your car to save you money.

Jun 23, 2026 2

OBD2 'fuel saver' boxes can actually increase costs by damaging your car - do this instead
No, there's no cheap - or expensive - dongle that you can plug into your car to save you money.
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