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Hi there, I am looking at a new vehicle and as I travel 25 kms each way daily over big Dunedin hills (Mt Cargill in fact) in icy and snowy winter conditions, I would like a fuel efficient and safe car. Are diesels significantly cheaper to run? And are they worth their greater initial cost? And are AWD or 4WDs safer on winter roads?
I have been looking at a late model BMW diesel X1 4WD but for the same price I could buy a new Subaru Impreza AWD petrol... Your thoughts would be greatly appreciated ????

Hi there,
The difference in running costs between petrol and diesel are very marginal, with the petrol
slightly cheaper than the diesel. The diesels are great for low down power for hills and towing, and also in my opinion better for AWD/4WD vehicles. Modern diesels are fantastic
to drive and quiet, you hardly know you are driving one.
http://www.consumerreports.org/cro/2012/12/2wd-awd-or-4wd-how-much-traction-do-you-need/index.htm
Follow this link to help understand the difference in AWD/ 4WD.