Rangordningen baseras på koldioxidutsläpp per kilometer.

Mindre småbilar:
Bästa:
81 g/km: Toyota Yaris 1,5 HSD, bensin/el
94 g/km: Kia Rio 1.1 CRDi, diesel
98 g/km: Ford Fiesta 1.6 TDCi ECOnetic DPF, diesel
99 g/km: Toyota Iq 1.0 VVT-i, bensin
100 g/km: Kia Rio 1.4 CRDi, diesel
Sämst:
120g/km: Toyota Yaris 1.33 VVT-i, bensin

Större småbilar:
Bästa:
87 g/km: Lexus Ct 200h, bensin/el
89 g/km: Toyota Auris 1.8 HSD, bensin/el
99 g/km: Volkswagen Golf 1.6 TDI 105 BlueMotion, diesel
101 g/km: Honda Insight 1.3 i-VTEC, bensin/el
107 g/km: Volkswagen Golf 1.6 TDI 105 BlueMotion Technology, diesel
Sämst:
134 g/km: Renault Scénic 1.5 dCi FAP, diesel; Opel Astra 2.0 CDTI ECOTEC DPF Sports Tourer, diesel

Mellanstora bilar:
Bästa:
59 g/km: Toyota Prius 1,8 HSD laddhybrid, bensin/el
89 g/km: Toyota Prius 1.8 HSD, bensin/el
99 g/km: Volvo S40 1.6D DRIVe S/S Classic, diesel
99 g/km: Volvo V50 1.6D DRIVe S/S Classic, diesel
109 g/km: Ford Focus 1.6 TDCi, diesel
Sämst:
161 g/km Volkswagen Passat 1.4 TSI 150 EcoFuel Variant, bensin/gas (alternativt drivmedel)
159 g/km: SAAB 9-3 2.0T BIOPOWER, besin/etanol

Stora bilar:
Bästa:
113 g/km Hyundai I40 1.7 CRDi, diesel
114 g/km Volvo S60 DRIVe, diesel
115 g/km Opel Insignia 2.0 CDTI ecoFLEX DPF, diesel
119 g/km BMW 5-Serie 520d EDE, diesel; Hyundai I40 1.7 CRDi, diesel; Opel Insignia 2.0 CDTI ecoFLEX DPF Sports Tourer, diesel; Volvo V60 DRIVe, diesel; Volvo V70 DRIVe, diesel; Volvo S80 DRIVe, diesel
Sämst:
209 g/km: Volvo V70 AFV Bi-Fuel, bensin/gas (alternativt drivmedel)
152 Audi A6 Ny 3.0 TDI quattro Avant, diesel

Se hela undersökningen på Folksams hemsida