I would like to buy a second hand car. I thought of getting a Golf Mk5 1.9 TDI. I want to use this car mainly for commuting to work (aprox 10 miles from my home), but will use it for traveling, sight seeing etc. When i talked to a friend of mine and told him about my car option, he said that from what he knows, diesel engines might start to malfunction if they are driven regularly only on short distances (under 20 miles) due to their DPF "regeneration" process that might not happen under optimal conditions. I was wondering if this is true and if, for the way i want to use the car, a petrol engine might be more suitable for me.