Magna tyre wear

My 2004 AWD Mitsubishi Magna wears out its tyres very quickly. The original Bridgestone G Grid II tyres lasted 35,000 km, next set were Toyo TEOs and again I only got around 35,000 km out of them. Previous vehicles I have owned have got at least 50,000 km, but they were rear wheel drive. The Magna is used predominantly for suburban use with occasional country driving. Have you heard of such high tyre wear in other AWD Magnas, and if so any ways in which to combat it?